cubitus

noun4

1. •
   The elbow, or the corresponding joint in the forelimb of a quadruped.
2. •
   The forearm; the arm from the elbow to fingertip, or the corresponding portion of a jointed limb of an animal that uses the limb for locomotion or grasping.
3. •
   One of the major veins of the insect wing, between the media and the postcubitus; the vein running along the dorsal edge of the discal cell.
4. •
   (no longer used) The ulna.