| 单词 |
pseudostome |
| 释义 |
pseudostome Zool.|ps-, ˈsjuːdəʊstəʊm|
[ad. mod.L. pseudostoma: see prec.]
1. The mouth or oral opening of the pseudembryo of an echinoderm.
1877[see pseudoproct s.v. pseudo- 2].
2. In a sponge, a false osculum or excurrent opening, the mouth of a secondary canal arising from fusion; also called pseudosculum (see pseudo- 2).
1887Sollas in Encycl. Brit. XXII. 416/1 (Sponges) The opening..to the exterior being termed a false oscule or pseudostome. The faulty use of the term oscule..is here obvious; for in one sense the oscule is always a pseudostome.
3. A rodent of the genus Pseudostoma (see prec., sense 3).
So pseuˈdostomine a., belonging or allied to the genus Pseudostoma; having external cheek-pouches, as a pocket-rat; pseudostoˈmosis, the formation of a pseudostome (sense 2); pseudostoˈmotic a., pertaining to or exhibiting pseudostomosis; pseuˈdostomous a. [Gr. ψευδόστοµ-ος having false mouths], belonging to a pseudostome, or having pseudostomes (sense 2).
1887Sollas in Encycl. Brit. XXII. 416/1 In some sponges..secondary independent openings, deceptively like oscules, are added. This pseudostomosis is due to a folding of the entire sponge, so as to produce secondary canals or cavities. 1890Cent. Dict., Pseudostomine..Pseudostomotic..Pseudostomous. 1895Syd. Soc. Lex., Pseudostomotic..Pseudostomous. |
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