| 单词 |
pneumatocyst |
| 释义 |
ˈpneumatocyst Zool.|-sɪst|
[f. pneumato- + cyst.]
a. An air-sac serving as a float in certain ‘colonial’ or compound Hydrozoa; the pneumatophore, or the cavity contained in this.
b. An air-sac in the body of a bird.
1859Huxley Oceanic Hydrozoa 6 In the adult, this sac, which I shall term the pneumatocyst, is sometimes open at the apex (Physalia, Rhizophysa), and can communicate with the exterior by a pore which traverses the ectoderm of the pneumatophore. 1861J. R. Greene Man. Anim. Kingd., Cœlent. 113 Apolemiadæ. Pneumatocyst small. Cœnosarc filiform. 1884Coues Key N. Amer. Birds 200 The Pneumatocysts.—A bird is literally inflated with these great membranous receptacles of air, and draws a remarkably ‘long breath’—all through the trunk of the body, in several pretty definite compartments. 1895Syd. Soc. Lex., Pneumatocyst, an air-sac, as found in birds, hydrozoa, etc.
Hence ˌpneumatoˈcystic a., belonging to or of the nature of a pneumatocyst.
1890in Cent. Dict. |
英语词典包含277258条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。
相关内容：
相关热词搜索：pneumatocyst英英词典英英释义英语词汇意思用法释义英语
单词 pneumatocele 释义 pneumatocele Path.|pnjumtsil, njum-|[ad. Gr. ή a flatulent tumour,......