Cū'bit, n.

n. [Lat. cubitum, cubitus, elbow, ell, cubit, from cubare, to lie down, to recline, because the elbow serves for leaning upon; the Gr. κῶβιτον (for ὠλέκρανον) seems to be taken from the Latin word.]

1. (Anat.) The fore-arm; the ulna, a bone of the arm from the elbow to the wrist. Coxe.
2. A measure of length, being the distance from the elbow to the extremity of the middle finger. The cubit varies in length in different countries, the Roman cubit being 17.47 inches, the Greek 18.20, the Hebrew somewhat longer, and the English 18 inches.