noun, plural ul·nae [uhl-nee] /ˈʌl ni/, ul·nas.

  1. Anatomy. the bone of the forearm on the side opposite to the thumb.Compare radius(def 7).
  2. a corresponding bone in the forelimb of other vertebrates.

noun plural -nae (-niː) or -nas

  1. the inner and longer of the two bones of the human forearm
  2. the corresponding bone in other vertebrates

n.inner bone of the forearm, 1540s, Latin, literally “elbow;” related to Old English eln (see elbow (n.)). n. pl. ul•nas

  1. The larger bone of the two bones of the forearm, extending from elbow to wrist on the side opposite the thumb.cubitus elbow bone

Plural ulnas ulnae (ŭl)

  1. The longer of the two bones of the forearm or lower portion of the foreleg. See more at skeleton.
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