| 释义 |
extensor, n.|ɛkˈstɛnsə(r)|
[a. late L. extensor, agent-n. f. extendĕre to extend.]
1. A muscle which serves to extend or straighten out any part of the body. Opposed to flexor.
[1706Phillips (ed. Kersey), Extensor Digitorum Communis..a Muscle of the Fingers.] 1713Derham Phys.-Theol. v. ii. (1747) 286 note, The peronæus Longus helps to..direct the Power of the other Extensors towards the Ball of the great Toe. 1748Hartley Observ. Man i. ii. 245 The Limbs have both long and short Flexors and Extensors. 1870Rolleston Anim. Life 14 The long radial extensor of the metacarpus.
2. attrib. in extensor-muscle; also extensor-surface, the surface of a bone to which the extensor muscles are attached.
1830R. Knox Béclard's Anat. 317 The contrary takes place with respect to the extensor muscles. 1859Darwin Orig. Spec. vi. (1878) 139 This flank membrane is furnished with an extensor muscle. 1881Mivart Cat 94 Its anterior or extensor surface is grooved for the passage of tendons. |