| 释义 |
‖ incus Anat. and Zool.|ˈɪŋkəs|
[L. incūs, incūd-em anvil, f. incūd-ĕre: see incuse v.2]
1. The middle one of the three small bones of the ear (malleus, incus, and stapes), to which the sonorous vibrations are conveyed from the malleus or ‘hammer’: = anvil 3 b.
1669Holder Elem. Speech 162 The Malleus lies along fixed to the Tympanum; and on the other end is joyned to the Incus by a double or Ginglymoid joynt. 1787Hunter in Phil. Trans. LXXVII. 434 The incus is attached by a small process to the tympanum, and is suspended between the malleus and stapes. 1856Todd & Bowman Phys. Anat. II. 70 The incus is shaped not unlike a molar tooth.
2. A part of the ‘trophi’ or mouth-apparatus in Rotifera, upon which the two mallei work.
1877Huxley Anat. Inv. Anim. iv. 188 The contraction of the muscular masses, to which the mallei are attached, causes the free ends of the latter to work backwards and forwards upon the incus. 1888Rolleston & Jackson Anim. Life 633 The mouth [in Rotifera] leads into an œsophagus, followed..usually directly by a muscular pharynx or mastax containing the chitinous jaw-apparatus or ‘trophi’. These consist of two hammer-like bodies, the mallei, which work against an incus or anvil..The incus [consists] of two pieces, rami, borne upon a single piece, the fulcrum. |