| 单词 | dehiscence |
| 释义 | dehiscence|dɪˈhɪsəns|
[ad. mod.L. dehiscentia ‘quum fructus maturus semina dispergat’ (Linnæus), f. L. dēhiscent-em, pr. pple. of dēhiscĕre: see -ence. So in mod.F.]
Gaping, opening by divergence of parts, esp. as a natural process: a. Bot. The bursting open of capsules, fruits, anthers, etc. in order to discharge their mature contents.
1828Webster cites Martyn. 1830Lindley Nat. Syst. Bot. Introd. 29 In Hamamelideæ dehiscence is effected by the falling off of the face of the anthers. 1870Bentley Bot. 243 The anthers..open and discharge the contained pollen; this act is called the dehiscence of the anther.
b. Anim. Physiol. Applied to the bursting open of mucous follicles, and of the Graafian follicles, for the expulsion of their contents.
1859Todd Cycl. Anat. V. 56/1 The ova..drop by internal dehiscence into the cavity of the ovary. 1870Rolleston Anim. Life Introd. 38 The ova are set free by dehiscence into the perivisceral cavity.
c. fig. and gen.
1853Kane Grinnell Exp. xxxiii. (1856) 285 The dehiscence..of such tensely-compressed floes, must be the cause of the loud explosions we have heard lately. 1860O. W. Holmes Elsie V. 139 A house is a large pod with a human germ or two in each of its cells or chambers; it opens by dehiscence of the front door..and projects one of its germs to Kansas, another to San Francisco. |
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