-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. -gène.]
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.