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n. An ancient unit of linear measure, originally equal to the length of the forearm from the tip of the middle finger to the elbow, or about 17 to 22 inches (43 to 56 centimeters).

n. A unit of linear measure, no longer in use, originally equal to the length of the forearm.

n. The forearm; the ulna, a bone of the arm extending from elbow to wrist.

n. A measure of length, being the distance from the elbow to the extremity of the middle finger.

n. In anatomy: The forearm or antebrachium; the arm from the elbow to the wrist.

n. The inner bone of the forearm; the ulna.

n. A linear unit derived from the length of the forearm.

n. In entomology, one of the veins, nerves, or ribs of an insect's wing; a cubital rib, succeeding the radius or sector. See phrases under cubitus.

n. an ancient unit of length based on the length of the forearm

"Bottom line: A cubit is the distance between some two points, wherever they are in what ever country in whatever period of history -- maybe."

linear unit    linear measure   

cubitus   

ell   

kilometer    millimeters    ell    centimeter    millimetre    ulna    light-year