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cubit

A name frequently applied to many units, ancient and modern, that are in concept based on the distance from the elbow to the tip of the outstretched middle finger.

1

In Burma, 20ᵗʰ century , a unit of length, = 18 inches (45.72 centimeters). Formerly (before metrication) the value of the cubit throughout the British Empire and Commonwealth.

United Nations, 1966.

2

An ancient Roman unit of length, about 443.55 millimeters.