| 释义 |
tricuspid, a. (n.)|traɪˈkʌspɪd|
[ad. L. tricuspis, -cuspid-em three-pointed, f. tri-, tri- + cuspis point: cf. F. tricuspide (Littré).]
Having three cusps or points. a. tricuspid valve or valves (Anat.): the valve consisting of three triangular segments (or, as otherwise regarded, the set of three triangular valves) which guards the opening from the right auricle into the right ventricle of the heart. Also absol. or as n.; hence attrib., as tricuspid murmur, tricuspid obstruction, tricuspid opening, tricuspid regurgitation, etc.
1670Phil. Trans. V. 2097 We did also observe two Ventricles with the tricuspid [and] sigmoid-valves. 1834J. Forbes Laennec's Dis. Chest (ed. 4) 547 In hypertrophy of the right ventricle..the thickening..is always a little greater in the vicinity of the tricuspid valves. 1872Huxley Physiol. ii. 36 On the right side there are..three of these broad pointed membranes, whence the whole apparatus is called the tricuspid valve. 1877Roberts Handbk. Med. (ed. 3) II. 10 Said to accompany tricuspid obstruction. Ibid. 43 Tricuspid Regurgitation. 1898Allbutt's Syst. Med. V. 786 Valvular incompetence..at the tricuspid opening. Ibid. 869 We may notice occasionally..a tricuspid systolic murmur.
b. Of various structures, as a tooth, leaf, etc.: also absol. or as n. a tricuspid tooth.
1849Florist 212 There is something very striking..about their tricuspid petals, and quaint, lively markings. 1856Woodward Mollusca iii. 449 The central teeth are..tricuspid in Loligo. 1881J. Anderson Scot. in Early Chr. T. iii. 130 In the West Highland crosses they are..terminated by a peculiar conventional, tricuspid leaf.
So triˈcuspidal, triˈcuspidate, triˈcuspidated adjs. in same sense.
1822–34Good's Study Med. (ed. 4) I. 520 The *tricuspidal valve, with the..sigmoid valve of the pulmonary artery..never exhibit bony deposits. 1852Salmon Higher Plane Curves vi. (1879) 253 The quartic is tricuspidal.
1752J. Hill Hist. Anim. 11 The Brachionus, with..a *tricuspidate tail. 1881Baker in Jrnl. Linn. Soc. XVIII. 280 Stigma capitate, obscurely tricuspidate.
1822J. Parkinson Outl. Oryctol. 197 An inequivalved..shell; *tricuspidated at the base. Ibid. 275 Teeth of cartilaginous fishes..triangular, conical, single pointed, tricuspidated, tridentated. |