1882, "hypothetical soul-stuff, the substance of a proposed spiritual body," coined by U.S. scientist Elliott Coues; see bio- + -gen. From 1899 as "hypothetical protoplasmic unit," from German Biogen (1895). Related: Biogenetic; biogenation.
biodiesel
biodiversity
bioethics
biofeedback
biofuel
biogen
biogenesis
biogenetic
biogenic
biogeny
biogeography
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