A combining form or prefix meaning twin substitutions on a single atom; e.g., the gem-dimethyl substitution on carbon-4 of lanosterol.

Origin: shortened form of L. Geminus, twin; OE. Gemme precious stone, F. Gemme, fr. L. Gemma a precious stone, bud.

(21 Jun 2000)

Gely, Jules, Gely's suture, GEM, gem < Prev | Next > Gemella, gemellipara, gemellology

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