biogenic

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biogenic

[¦bī·ō¦jen·ik]
(biology)
Essential to the maintenance of life.
Produced by actions of living organisms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Some biogenic substances, such as hydroxylapatite in teeth, whewellite in urinary calculi or aragonite in the shells of molluscs, also exist as minerals formed by geochemical processes, and therefore are regarded as valid minerals.