any effect on, interaction with, or response from living tissue.
(of a substance) having or producing an effect on living tissue
Relating to a substance that has an effect on living tissue.
noun the oxidative treatment of raw sewage by aeration
noun (functioning as sing) the use of aircraft in the discovery, development, and protection of natural and biological resources
noun the branch of archaeology that deals with the remains of living things
the extent to which a nutrient or medication can be used by the body. noun the extent to which a drug or other substance is taken up by a specific tissue or organ after administration; the proportion of the dose of a drug that reaches the systemic circulation intact after administration by a route other […]