-genous

from The Century Dictionary.

• noun The terminal element in some words of Latin origin, meaning ‘-born,’ as in indigenous, born within a country, amnigenous, river-born, montigenous, mountain-born, etc.
• noun The termination of adjectives from nouns in -gen, as in acrogenous, nitrogenous, etc.

from the GNU version of the Collaborative International Dictionary of English.

• A suffix signifying producing, yielding