any chemical that destroys life by poisoning, especially a pesticide, herbicide, or fungicide.
a chemical, such as a pesticide, capable of killing living organisms
A chemical agent, such as a pesticide or herbicide, that is capable of destroying living organisms.
adjective (of deposits, esp limestones) derived from shell fragments or similar organic remains
a self-sufficient community of naturally occurring organisms occupying and interacting within a specific biotope. noun a diverse community inhabiting a single biotope biocenosis (bī’ō-sĭ-nō’sĭs) Plural biocenoses (bī’ō-sĭ-nō’sēz) A group of interacting organisms that live in a particular habitat and form a self-regulating ecological community.
the capability of coexistence with living tissues or organisms without causing harm: Artificial joint adhesives must have biocompatibility with bone and muscle.
noun (ecology) the cycling of chemicals through the biosphere