Definition of terms

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Name Description Related terms

Of, or pertaining to, fish.


The 50 per cent infectious dose.

The virus dilution where 50 per cent of the inoculated hosts are infected.

identified impurity

An impurity for which a structural characterisation has been achieved.

identifying information

From r. 3 of the Agvet Code Regulations (unless the contrary intention appears):

For a person, means the following information:

  1. the person's name
  2. the person's ABN or ACN (if any)
  3. the person's trading name (if any)
  4. whether the person is an individual or a body corporate
  5. the person's street address
  6. if the person's postal address is different from the person's street address—the person's postal address.


image product

A product containing one or more approved active constituent(s), where the product is closely similar to an APVMA-registered reference product.

immediate containe
Immediate container

The container that is in direct contact with a packaged agvet chemical product.


Two or more liquids that, under normal conditions, cannot be added together to produce a mixture that will remain uniform and will not separate into layers (eg oil and water are immiscible).


The reversible or irreversible loss of a compound's mobility due to sorption or conjugation.


A state of not being affected by a disease or a poison.

Exempt from or protected against.


The ability of a plant or animal to remain free from, or to resist infection by, a parasitic organism by virtue of inherent properties. A state, either natural or acquired, in which an organism is exempt from, or resistant to, a disease.

Non susceptibility to the invasive pathogenic effects of foreign organisms or to the toxic effects of antigenic substance.

immunobiological medicines
immunobiological product

From r. 3 of the Agvet Code Regulations (unless the contrary intention appears): Means a chemical product which, when administered to a vertebrate or invertebrate living creature, provides, induces or changes an immune response to a particular chemical or biological entity in that creature.

The definition extracted above could potentially include, for example, vaccines, antisera, antibodies, monoclonal antibodies and cytokines.


The ability to produce effect on the functioning of cells and organs involved in immune function.


to bring into Australia

imported product

From s. 3 of the Agricultural and Veterinary Chemical Products (Collection of Levy) Act 1994.

[For the purposes of levy collection] means a chemical product that has been imported into Australia (whether or not the product was manufactured in Australia).

impregnated fabric

Fabric(s) or fibre(s) impregnated with a pesticide (such as a repellent-impregnated jacket, repellent-impregnated towelettes, herbicidal string and pet collars) that employ an impregnated cloth to contain the pesticide.


Any constituent other than the active constituent or an intentionally added non-active constituent. Impurities include intermediates, reaction products, degradation products, contaminants and chemicals added for purposes of extraction of purification.

In the manufacture of immunobiological products, any component of the drug substance (bulk material) or finished product that is not the chemical entity defined as the product, including its active constituent(s) or excipient(s).

impurity profile

A description of the identified and unidentified impurities present in a substance.

in vitro

In an experimental situation outside the organism. Biological or chemical work done in the test tube or other artificial environment rather than in living systems.

Compare with 'in vivo'.

in vivo

In a living cell or organism.

Compare with 'in vitro'.


An application of a product to or in a furrow in which a crop is planted.

in-process control

Checks performed during production in order to monitor and, if necessary, adjust the process to ensure that the product conforms to its specifications. The control of the environment or equipment may also be regarded as a part of in-process control.

incremental sample

A quantity taken from a single place in a lot to form part of an aggregate sample.

Incurred sample
indicator organism or indicator species

An organism, species or community of organisms used for the characterisation of the environmental quality.

industrial area

Factories, factory land, industrial sites, parking lots, fuel tank farms and outside chemical storage areas.

Industry Liaison Committee (ILC)

The principal objective of ILC is to promote active engagement of peak agvet chemical industry stakeholders in the APVMA's strategic planning, ie the operational issues and reforms developed by the APVMA in its role in managing the National Registration Scheme.

inert constituent

The invasion of part of the body (animal or plant) by living pathogenic microorganisms. To enter and establish a pathogenic relationship with a higher organisms; to enter and persist in a carrier.

infectious unit

The smallest amount of virus that produces some recognisable effect in the host system employed.


To invade (usually confined to plant and animal pests rather than microorganisms) in large numbers.


Pests that are found in an area or location where they are not wanted.


Attacked or invaded by animals, especially insects.


A term previously used to describe substances now called 'flammable'.


A flower cluster.

The general arrangement and disposition of the flowers on an axis.

The mode of development of the flowers.

Information Publication Scheme (IPS)

A scheme designed to increase the proactive disclosure of information to the public, established under Part II of the Freedom of Information Act 1982 (FOI Act). Disclosed information includes information about what the APVMA does and how it does it, as well as information dealt with or used in the course of its operations. The IPS was implemented as part of the 2010 freedom of information reforms.

infringement notice

A notice setting out the particulars of an alleged offence and giving the person the option of paying a specified penalty (or by nonpayment to elect to have the matter dealt with by a court).

inhalation toxicity

A measure of the poisonous effect of a pesticide to an animal or person when breathed in through the lungs


A pesticide used to prevent or suppress growth or other physiological processes in plants. Sometime referred to as a 'growth inhibitor'.

initial charging

for ectoparasiticide dips

The initial mixing of a pesticide with water, at the manufacturer's recommended dilution rate, to prepare a dipping fluid at a recommended concentration.


To force a pesticide into a plant, an animal, a building, a structure or the soil.


A device through which residual liquid in a sprayer can be circulated so as to draw in water at greater rates than can be achieved by using a pump directly.

inner pack

The container in which an agvet chemical product is directly packed and which is placed within an outer pack when presented for sale. In the case of a bottle in a box, the bottle is the inner pack and the box is the outer pack.


To bring infectious material (the inoculum) in contact with a host plant. To introduce microorganisms or virus (the inoculum) into an organism or into the substratum.


The substance used for inoculating.

inorganic pesticides

Pesticides that do not contain carbon (eg Bordeaux mixture, copper sulfate, sodium arsenite, sulphuric acid).


A small invertebrate animal belonging to the class Insecta and having three body regions (head, thorax, and abdomen) and six jointed legs; may have two, four or no wings. Examples include beetles, bugs, bees and flies.

insect growth regulator (IGR)

A synthetic organic pesticide that mimics insect hormonal action so that the exposed insect cannot complete its normal development cycle and dies without becoming an adult.

insect vector

An insect that transmits a disease-inducing organism or agent.


Any substance or mixture of substances intended for preventing, destroying, repelling or controlling any of the numerous small invertebrate animals generally belonging to the class Insecta. For convenience, insecticides are also described as preventing, destroying or controlling non-insects from other (non-insect) classes of arthropods such as spiders, mites, ticks, centipedes or slaters.


From s. 3 of the Agvet Code:


  1. a person appointed as an inspector for the purposes of [the Agvet] Code under subsection 69F(1) of the Agricultural and Veterinary Chemicals (Administration) Act 1992 , or
  2. a person to whom an authorisation referred to in subsection 69F(2) of that Act applies for the purposes of [the Agvet] Code.

The form of an insect between molts.


From s. 3 of the Agvet Code:

Includes direction, caution, warning or recommendation.

instructions approved by the APVMA

From s. 3 of the Agvet Code:

Includes authorisations and requirements (however described) set out in a permit.

intake study

A study designed to measure or estimate actual dietary exposures of consumers to pesticide residues or contaminants in order to compare such exposures to the acceptable daily intakes.

integrated pest management (IPM)

The use of pest and environmental information in conjunction with available pest control technologies to prevent unacceptable levels of pest damage by the most economical means and with the least possible hazard to persons, property, and the environment. IPM uses a combination of farm hygiene, crop scouting and monitoring, economic spray thresholds and the presence of beneficial insects, such as chemical spray decision tools.

integrated weed management

The control of weeds through the combined use of herbicides, mechanical and cultural practices, and biological control agents.


A mobile DNA element that can capture and carry genes, particularly those important in antibiotic resistance. Commonly, the genes for antibiotic resistance are located on gene cassettes and these are carried by the integrons.

Interested person

For biotechnological or biological products, a material produced during a manufacturing process that is not the active constituent or product, but whose manufacture is critical to the successful production of the active constituent or the product. Generally, an intermediate will be quantifiable and specifications will be established to determine the successful completion of the manufacturing step before the manufacturing process is continued. This includes material that may undergo further molecular modification or be held for an extended period before further processing.

intermediate product

Partly processed material that must undergo further manufacturing steps before it becomes a bulk product.

international nonproprietary name (INN)

The identification of pharmaceutical substances or active pharmaceutical constituents. Each INN is a unique name that is globally recognised and is public property. A non-proprietary name is also known as a generic name.


The portion of a stem or branch between nodes (ie between the attachment points of leaves or branches).

intestinal parasites

An adverse effect due to intake or exposure to any substance—a toxic reaction.

intramammary preparations

Preparations for administration directly into the milk canal of cows for the treatment of mastitis.

Intraruminal product

products for oral administration to ruminant animals designed to be retained in the rumen to deliver active substances in a continuous or pulsatile manner

intraspecific herbicide resistance

A situation in which two biotypes of the same weed species, often morphologically indistinguishable, differ markedly in sensitivity to a particular herbicide.


The growth or movement of an infectious agent into a plant and its establishment in the plant.

The movement of pests into an environment.

The establishment of pests in a new location or environment.


A reversal of the usual tendency for temperature to decrease with increased height above sea level. The 'inversion layer' formed provides stable conditions and there is no air movement through the layer.

invert emulsion

The suspension of minute water droplets in a continuous oil phase.


Any animal without a bony spinal column (eg insects, molluscs, nematodes).

inverted emulsifiable concentrate

A concentrated solution of the active constituent in oil or other solvents, forming with water a water-in-oil emulsion.

investigation powers

From s. 3 of the Agvet Code:

Has the meaning given by sections 132A, 132B and 132C. Section 132A describes investigation powers that an inspector may exercise in relation to premises. Section 132B describes, generally speaking, the investigation powers relating to operating electronic equipment. Section 132C describes investigation powers that relate to seizing evidence that relates to certain offences and civil penalty provisions.

investigation warrant

A warrant issued under section 143A of the Agvet Code or a warrant signed by a magistrate under section 143B of the Agvet Code as the same kind that would have been issued under section 143A. (see definition in s 3 of the Agvet Code).


in an experimental study or clinical trial

An individual responsible for all aspects of the conduct of a study at a study site. If a study is conducted by a group of individuals at a study site, the investigator is the leader of the group.

ionic surfactant

A surfactant made up of molecules that have either negatively or positively charged heads. The properties of an ionic surfactant relate to its charge.


Integrated Risk Information System. The database of the United States Environmental Protection Agency that provides the agency's hazard and dose—response assessments for chemical and radiological agents. Used as guidance and to provide consistency in the agency's regulatory decisions designed to reduce risk related to environmental exposures.


Chemicals that have the same molecular weight and formula, but differ in the spatial arrangement of their atoms. This results in different physical, chemical and biological properties. The different isomers are often distinguished by letters of the Greek alphabet.


International Union of Pure and Applied Chemistry. An association of many national and international chemical societies, formed to improve international understanding and activity in many aspects of chemistry.

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