a poisonous substance; not necessarily synonymous with toxin, which refers usually to poisonous substances produced by living organisms Used particularly of fungicides, bactericides, insecticides etc
Any chemical or mixture of chemicals that presents a risk of death, disease, injury, or birth defects in organisms that ingest or absorb it
- substances that produce adverse biological effects of any nature; may be chemical or physical in nature; effects may be of various types (acute, chronic, etc)
A poisonous substance such as the active ingredient in pesticide formulations that can injure or kill plants, animals, or microorganisms *
A substance that kills or injures an organism through chemical or physical action or by altering the organism's environment; for example, cyanides, phenols, pesticides, or heavy metals; especially used for insect control