Belonging to the arm, fore leg, wing, pectoral fin, or other fore limb of a vertebrate; especially, belonging to the upper part of such member, from the shoulder to the elbow.Of or pertaining to the brachia of the Brachiopoda or of other animals, as the wings of pteropods, the arms of cephalopods, the rays of crinoids, etcn. In ichthyology, one of the series of bones to which the rays of the pectoral fins of fishes are attached.n. In human anatomy: The brachial artery. In the Latin form brachialis (anticus), a muscle of the front of the upper arm, arising from the front of the humerus and inserted into the ulna, flexing the forearm. Also called anticobrachialis. See cut under muscle.n. One of the joints of the branches of a crinoid, between the radials and the palmars; one of the joints of the third order, or of a division of the radials.n. In the morphology of the Crinoidea, one of the calcareous plates which compose the arms.