the series of chemical changes occurring in a compound, especially a drug, as a result of enzymatic or other activity by a living organism.
a controlled laboratory environment designed to provide uniform experimental conditions with the aim of producing uniform organisms for use in experiments.
noun a parasitic organism, esp a fungus
the alteration and disturbance of a site by living organisms; the turning and mixing of sediments by organisms, as rodents. bioturbation (bī’ō-tər-bā’shən) The stirring or mixing of sediment or soil by organisms, especially by burrowing, boring, or ingestion.