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The Collaborative International Dictionary
Polygenous

Polygenous \Po*lyg"e*nous\, a. [Poly- + -genous: cf. Gr. ? of many families.] Consisting of, or containing, many kinds; as, a polygenous mountain.
--Kirwan.

Douglas Harper's Etymology Dictionary
polygenous

"composed of many kinds," 1797; see poly- + genus.

Wiktionary
polygenous

a. Consisting of, or containing, many kinds; as, a polygenous mountain.