Definition of -gen in English:

-gen

Syllabification: -gen

combining form

1 Chemistry Denoting a substance that produces something: oxygen allergen
2 Botany Denoting a substance or plant that is produced: cultigen

Origin

via French -gène from Greek genēs '-born, of a specified kind', from gen- (root of gignomai 'be born, become', genos 'a kind').

Definition of -gen in:

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Word of the day antebellum
Pronunciation: ˌantēˈbeləm
adjective
occurring or existing before a particular war…