| 释义 |
‖ ptosis|ˈptəʊsɪs|
Pl. ptoses |-iːz|.
[a. Gr. πτῶσις falling, fall.]
A falling, prolapsus: a. spec. Drooping of the upper eyelid from paralysis of the elevator muscle.
1743tr. Heister's Surg. (1763) I. 390 Of Relaxation and Tumor of the Eye-lids, termed Phalangosis and Ptosis. 1807–26S. Cooper First Lines Surg. (ed. 5) 310 Wounds of the lower part of the forehead or eyebrow, are sometimes followed by the disorder named ptosis, in which the upper eyelid hangs down. 1899Allbutt's Syst. Med. VII. 681 Ptosis of the right upper eyelid appeared.
b. Prolapsus of any of the viscera or of the breasts.
1897Allbutt's Syst. Med. III. 587 To discuss ptosis of the abdominal organs. 1905Brit. Med. Jrnl. 26 Aug. Epit. Curr. Med. Lit. 34 The relative frequency and importance of ptosis of the various organs. 1909Amer. Jrnl. Med. Sci. CXXXVII. 380 Ptoses of the splenic flexure and descending colon are rare. 1934S. Beckett More Pricks than Kicks 68 Man with weak bladder and tendency to ptosis of viscera. 1953Pageant Aug. 68 About 4,000,000 young American women suffer in some degree from micromastia (immature breasts) and another 10,000,000 from ptosis (or collapse or sagging of the breasts). 1957J. Lapides in J. G. Allen et al. Surgery xlviii. 1311/2 A number of operations have been devised and used for the fixation of the highly mobile kidney—renal ptosis. 1965R. P. G. Sandon in R. J. V. Battle Plastic Surg. xiv. 319 Clothing tends to confine and flatten, rather than support correctly, such an enormous bosom, and with the years the relaxation of the skin allows an increasing element of ptosis.
Hence ptotic |ˈptəʊtɪk| a., pertaining to or affected with ptosis.
1890in Cent. Dict. 1969J. H. DeWeerd in Glenn & Boyce Urologic Surg. iv. 122/2 The hypermobile (ptotic) kidney. |