| 释义 |
depressor|dɪˈprɛsə(r)|
Also 7 -er, -our.
[a. L. dēpressor, agent-n. from dēprimĕre, dēpress- to press down, depress. In OF. dépresseur.]
1. One who or that which depresses (in various senses: see the verb).
1611Cotgr., Abbaisseur, an abaser..depresser, humbler. 1621Bp. R. Montagu Diatribæ 112 That..would haue raised it selfe against all depressors and detractors. a1639Wotton in Gutch Coll. Cur. I. 219 Those that rayse stand ever in..hazard to be thought..the fittest depressours. 1868Bain, The causes of pain and the depressors of vitality.
2. Anat. and Phys.
a. A muscle which depresses or pulls down the part to which it is attached; also attrib. as depressor muscle.
b. depressor nerve: a branch of the vagus, the stimulation of which lowers the pressure of the blood.
1615Crooke Body of Man 741 Euery leuator or lifting muscle hath a depressor or sinking muscle. 1748Hartley Observ. Man i. ii. 148 The Depressors of the lower Jaw. 1872Huxley Phys. ix. 234 The lower [eye-] lid has no special depressor. 1875H. C. Wood Therap. (1879) 132 The vagi and depressor nerves did not appear to be affected.
3. Surg. An instrument for pressing down some part or organ.
1874Knight Dict. Mech., Depressor (Surgery), an instrument like a curved spatula, used for reducing or pushing into place an obtruding part. Such are used in operations on the skull..and in couching a cataract. 1883Syd. Soc. Lex., Tongue depressor, a flattened metallic plate for depressing the tongue, in order to see the throat. |