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

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

A G M a angstrom unit astronomical unit block centimeter chain chiliad chiliagon chiliahedron chiliarch chiliarchia cubit decameter decimeter dekameter ell em en fathom finger foot footstep fur furlong grand hand inch kilo kilocycle kilogram kilohertz kiloliter lakh league light-year line link meter micron mil mile millennium millepede milligram milliliter myriad myriameter nail one hundred thousand pace palm parsec perch pica point pole rod step stride ten thousand thou thousand wavelength yard