CUBIT
- any of various ancient units of length based on the length of the forearm from the elbow to the tip of the middle finger and usually equal to about inches centimeters.
- an ancient measure of length [n CUBITS] : CUBITAL [adj]
- ancient linear unit based on the length of the forearm, from elbow to the tip of the middle finger, usually from 17 to 21 in. (43 to 53 cm)
- an old measure of length [n -S]