单词 | prestomium |
释义 | prestomiumn. Zoology. disused. = prostomium n. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > mouth or epiglottis prestomium1870 prostomium1870 furcula1887 thyroglossal duct1909 1870 G. Rolleston Forms Animal Life p. cxxx The eyes are usually but not exclusively carried upon the praestomium. 1877 T. H. Huxley Man. Anat. Invertebrated Animals v. 232 The peristomium and the praestomium together are ordinarily confounded under the common term of ‘head’. 1931 Proc. Royal Soc. B. 108 488 The most anteriorly placed flagellates may project into the prestomium. Derivatives preˈstomial adj. disused = prostomial adj. ΚΠ 1877 T. H. Huxley Man. Anat. Invertebrated Animals v. 232 The praestomial tentacle is similar in structure to an ordinary cirrus. 1909 Science 12 Mar. 427/2 One pair of cœlomic sacs develops anterior to the mouth, and the rostral prominences are to be considered prestomial appendages of this head segment. This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022). < n.1870 |
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