Biological; pertaining to biology or to a living organism.

An extremely complex drug, vaccine or antitoxin that is made from a living organism, or from products of a living organism.

The woman from whom one inherits half of one's DNA and who is the source of one's mitochondrial DNA.

plural of biological parent

A child's natural parent, either the male who supplied the sperm or the female who supplied the egg which interacted for the child's conception.

A field of study that embraces both chemistry and biology.

The use of any harmful organism (such as a bacterium or virus) as a weapon of war.

biochemical oxygen demand

The amount of oxygen needed by aerobic microorganisms to decompose all the organic matter in a sample of water; it is used as a measure of pollution.

(biology, geography, uncountable) The study of the geographical distribution of living things. / (biology, geography, countable) The geographical distribution of a particular living thing.