CUBIT, n. L., the elbow signifying a turn or corner Gr.
1. In anatomy, the fore arm the ulna, and bone of the arm from the elbow to the wrist.
2. In mensuration, the length of a mans arm from the elbow to the extremity of the middle finger. The cubit among the ancients was of a different length among different nations. Dr. Arbuthnot states the Roman cubit at seventeen inches and four tenths the cubit of the scriptures at a little less than 22 inches and the English cubit at 18 inches.