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The Collaborative International Dictionary
Biparous

Biparous \Bip"a*rous\, a. [L. bis twice + parere to bring forth.] Bringing forth two at a birth.

Douglas Harper's Etymology Dictionary
biparous

"bringing forth two at birth," 1731, from bi- + Latin -parus, from parere "bring forth, bear" (see pare).

Wiktionary
biparous

a. producing two offspring from one pregnancy; twinning

WordNet
biparous

adj. producing two offspring at a time [syn: twinning]