bipennate adjective3 •Of, pertaining to, or having the nature of a muscle, the fibres of which attach to a tendon on two sides (as a feather barbed on both sides).It then follows that bipennate muscles generate even more force than unipennate ones of similar volume, and the force increases with the angle of pennation. — 1999 •Bipinnate (pinnate and having a pinnate leaflet).But this Burnet Pimpinella is of a different (Umbelliferous) order, though similarly styled because its leaves are likewise bipennate. — 1897 •Having two wings; bipennated.
