-gen \jə̇n, ˌjen\noun combining form also-gene\ˌjēn\ (-s) Etymology: French -gène, from Greek -genēs born, from root of gignesthai to be born — more at kin 1.: one that generates < halogen > < melanogen > < androgen > 2.: one that is produced or generated < exogen > < cultigen > < phosgene >