A chemical or fluid that alters the performance of an engineered slurry or treatment fluid. Some remedial cementing treatments require unpredictable volumes of cement slurry to achieve the desired res [..]

Minor impurity present in a substance. Extraneous material inadvertently added to a sample prior to or during chemical or biological analysis In some contexts, as in relation to gas cleaning equipment [..]

Any substance that enters a system (the environment, human body, food, etc.) where it is not normally found. Contaminants are usually referred to in a "negative" sense and include su [..]

harmful or toxic substance.

Any foreign or unwanted substance that can have a negative effect on system operation, life or reliability.

A contaminant is something that shouldn't be present in a substance and that has corrupted the purity or integrity of the substance. For example, water can be contaminated with chemicals or lead [..]

Any foreign component in a substance, for example in water.

Any physical, chemical, biological, or radiological substance causing an impurity in the environment.

a substance present where it should not be.

Any substance occurring in foodstuffs that was not added intentionally. Contaminants can arise from packaging, food processing and transportation, farming practices or the use of animal medicines. The [..]

Any foreign component in a substance, for example in water.

(n) a substance that contaminates

A substance that is not naturally present in the environment or is present in amounts that can, in sufficient concentration, adversely affect the environment.

Something that has contaminated another substance, causing it to become impure

Any physical, chemical, biological, or radiological substance or matter that has an adverse effect on air, water, land/soil, or biota. The term is frequently used synonymously with pollutant.

A substance, liquid or solid, which is present in a break. Contaminants must be removed from a break before a repair can begin.

In some contexts (e.g., in relation to gas cleaning equipment), used as a synonym for pollutant (ISO, 1979).

Any physical, chemical, biological or radiological substance or matter that has an adverse effect on air, water or soil.

A substance that is either present in an environment where it does not belong or is present at levels that might cause harmful (adverse) health effects.

Any physical, chemical, biological, or radiological substance or matter that has an adverse effect on air, water, or soil. (EPA Glossary)

regulated substance released into the environment

Any physical, chemical, biological, or radiological substance or matter that has an adverse affect on air, water, or soil.

A substance that is not naturally present in the environment or is present in unnatural concentrations that can, in sufficient concentration, adversely alter an environment. Federal regulations (40 CF [..]

Any physical, chemical, biological, or radiological substance or matter that has an adverse effect on air, water, or soil.

Any physical, chemical, biological, or radiological substance or matter that has an adverse effect on air, water, or soil.

Any physical, chemical, biological or radiological substance or matter present in any media at concentrations that may result in adverse effects on air, water or soil. A harmful or hazardous matter in [..]

Any material that is unwanted or adversely affects the fluid power system and/or its components.

a substance, microorganism or virus accidentally introduced into a culture, substrate or medium; generally, any ` unwanted ` material in an experimental system.

A substance that is either present in an environment where it does not belong or is present at levels that might cause harmful (adverse) health effects.

Any harmful or undesirable substance found in water. Contaminants include microorganisms, dissolved naturally occurring minerals, human-generated chemicals, and radiological materials.

Pollutant. Unwanted substances that get into sources of drinking water or stormwater.

Anything added to a substance that makes the substance unfit for use. i.e. motor oil is a contaminant in drinking water but not for a car engine

Biological, chemical or physical matter that may lead to a food safety risk (for example, physical matter such as glass in food) or an allergen.

an unwanted microorganism and/or foreign matter.

Any impurity or substance that pollutes another; an agent of contamination accidently or inadvertantly introduced into food, water, soil, or air, that may or may not be harmful or potentially poisonou [..]

A substance that pollutes or infects something.

unwanted material. Physical contaminants of compost include glass, plastic, and stones, and chemical contaminants include trace heavy metals and toxic compounds.

Biological or chemical substance or entity, not normally present in a system, capable of producing an adverse effect in a biological system, seriously injuring structure or function.

Anything that makes the water or land impure, unclean or polluted.

A substance that is: - not naturally present in the material, or - present in quantities greater than those that exist naturally which could lead to pollution (persistence, residues) and toxicity risks. Contaminants may be: - heavy metals - aromatic hydrocarbons - pesticides - dioxins & PCBs - radioactivity - GMOs - mycotoxins - medicinal resid [..]

A substance that is either present in an environment where it does not belong or is present at levels that might cause harmful (adverse) health effects; any physical, chemical, biological, or radiological substance or matter that has an adverse effect on air, water, or soil.

An undesired component in a pure gas or gas mixture.

A contaminant is an unwanted airborne constituent that may reduce the acceptability of the air. Also a contaminant is considered as any unwanted substance present in or on a material or any surface wi [..]

An undesired component in a pure gas or gas mixture.

Includes any substance that either by itself or in combination with other substances, chnages the physical, chemical, or biological condition of the receiving environment when the substance is discharged.

Any physical, chemical, biological or radioactive substance that can have an adverse effect on air, water or soil, or on any interior or exterior surface.

  See Environmental Contaminant.

A substance that is not naturally present in the environment or that is present in unnatural concentrations or amounts, and which can (in sufficient concentration) adversely alter an environment.

any element, substance, compound, mixture, or agent, other than a hazardous substance, which, after release from a facility and upon exposure of, ingestion, inhalation, or assimilation into any organism, wither directly from the environment or indirectly by ingestion, inhalation, or assimilation into any organism, either directly from the environme [..]

A material added by humans or natural activities that may, in sufficient concentrations, render the environment unacceptable for biota. The mere presence of these materials is not necessarily harmful (USFWS).

Any substance or material in a system (the environment, the human body, food, etc.) where it is not normally found; or, a substance in a system where it is naturally occurring , but found in an unusua [..]

Any substance that when added to water (or another substance) makes it impure and/or unfit for consumption or use.

an impurity, that causes air, soil, or water to be harmful to human health or the environment.

any foreign or unwanted substance that can have a negative effect on system operation, life or reliability.

1) "A substance that is either present in an environment where it does not belong or is present at levels that might cause harmful effects to humans or the environment (source)." 2) Any phys [..]

Any physical, chemical, biological or radiologic substance or matter that has an adverse effect on air, water, land/soil or biota. The term is frequently used synonymously with pollutant.

Unwanted substance or material defined according to the intended use.

Any physical, chemical, biological, or radiological substance in air, soil or water that has an adverse effect.

An impurity or foreign substance present in a material that affects one or more properties of the material. Electrical Engineering Terms Interfacebus.com Home Page Electronic Parts Distributors Hardwa [..]

Any physical, chemical, biological, or radiological substance or matter that has an adverse effect on air, water, or soil.

That which contaminates; an impurity; foreign matter. ''Keep the lid on the jar to keep contaminants out.'' ----