-gen (?). [(1) From Gr. -gen-, from the same root as ge`nos race, stock (see Genus). (2) From Gr. suffix -genh`s born. Cf. F. -gene.]
1.
A suffix used in scientific words in the sense of producing, generating: as, amphigen, amidogen, halogen.
2.
A suffix meaning produced, generated; as, exogen.
© Webster 1913.