supinator Anat.
(ˈs(j)uːpɪneɪtə(r))
[mod.L., f. supīnāt-, supīnāre to supinate: see -or. Cf. F. supinateur (16th c.).]
A muscle by which supination is effected or assisted; spec. one of two muscles of the fore-arm or fore limb, supinator radii brevis and supinator radii longus.
| 1615 Crooke Body of Man 783 The second supinator which is the shorter..ariseth fleshy. 1770 Pennant in Phil. Trans. LX. 323 The tendinous muscles..have much the same effect on the tail as the supinator and pronators have in turning the hand. 1808 Barclay Muscular Motions 389 In rolling the arm, the rotators radiad co-operate with the muscles called supinators. 1872 Humphry Myology 42 In the dorsal aspect, the short or deep extensor is connected only with the lower edge of the supinator. |
| attrib. 1826 Kirby & Sp. Entomol. xliii. IV. 172 Insects..cannot have the Supinator and Pronator muscles. 1875 Encycl. Brit. I. 839/1 The supinator and pronator muscles are all inserted into the radius. |