Definitions

from The Century Dictionary.

  • Having two wings: as, “bipennated insects,”
  • In botany, same as bipinnate, .
  • In Mollusca, same as bipectinate, 2.

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

  • adjective Having two wings.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective medicine, anatomy, zoology 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).
  • adjective botany, of leaves Bipinnate (pinnate and having a pinnate leaflet).

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From bi- +‎ pennate.

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Examples

  • A modification of this condition is found where oblique fibers converge to both sides of a central tendon; these are called bipennate, and an example is afforded in the Rectus femoris.

    IV. Myology. 1. Mechanics of Muscle 1918

  • Martian humanity is, in fact, a race of sextuple origin; but it is, at present, biped, bimanous and what may be called bipennate, since those beings have two wings.

    Part III, Chapter III of "Uranie" 1890

  • (Umbelliferous) order, though similarly styled because its leaves are likewise bipennate.

    Herbal Simples Approved for Modern Uses of Cure William Thomas Fernie

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