nAnconeus(Anat) A muscle of the elbow and forearm.
Century Dictionary and Cyclopedia
nanconeusA name once given to any of the muscles attached to the ancon or olecranon: now usually restricted to a small muscle arising from the back part of the external condyle of the humerus, and inserted into the side of the olecranon and upper fourth of the posterior surface of the ulna.
nanconeusSame as anconeus.
Webster's Revised Unabridged Dictionary
NL., fr. L. ancon, elbow
The anconeus, similarly triangular, is broader externally.