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c.1200, elbowe, from Old English elnboga, from ell "length of the forearm" + boga "bow, arch," from West Germanic *alinobogan, from Proto-Germanic *elino-bugon, literally "bend of the forearm" (cf. Middle Dutch ellenboghe, Dutch elleboog, Old High German elinbogo, German Ellenbogen, Old Norse ölnbogi).
Second element related to Old English bugan "to bend" (see bow (v.)); first element from *alina "arm," from PIE *el- (1) "elbow, forearm" (see ell (n.1)). Phrase elbow grease "hard rubbing" is attested from 1670s, from jocular sense of "the best substance for polishing furniture." Elbow room attested from mid-16c.
"thrust with the elbow," c.1600, from elbow (n.). Figurative sense is from 1863. Related: Elbowed; elbowing.
elbow el·bow (ěl'bō')
The joint or bend of the arm between the forearm and the upper arm. Also called cubitus.
The bony outer projection of this joint.
Something having a bend or an angle similar to an elbow.
in human anatomy, hinge joint formed by the meeting of the humerus (bone of the upper arm) and the radius and ulna (bones of the forearm). The elbow allows the bending and extension of the forearm, and it also allows the rotational movements of the radius and ulna that enable the palm of the hand to be turned upward or downward