单词 | synangium |
释义 | synangiumn. 1. Anatomy and Zoology. A collective or common blood vessel from which several arteries branch; spec. the terminal part of the arterial trunk in the lower vertebrates. ΘΚΠ the world > life > the body > vascular system > blood vessel > artery > [noun] > types of preparing vessela1618 pulmonary artery1679 arteriole1685 mammary1697 omphalomesenteric1728 collateral arteriesa1788 perforator1824 vas vasorum1848 comes1875 synangium1875 loop-artery1899 1875 T. H. Huxley in Encycl. Brit. I. 763/1 Pylangium and synangium, together, are the equivalents of that portion of the heart which lies between the ventricle and the anterior wall of the pericardium. 1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 176 The terminal part common to the divergent trunks is the synangium. 2. Botany. The oblong mass of coherent sporangia in ferns of the order Marattiaceæ. ΘΚΠ the world > plants > particular plants > ferns > [noun] > horseshoe fern or part king fern1829 para1869 potato fern1881 synangium1881 horseshoe-fern1898 1881 J. S. Gardner in Nature 13 Oct. 560/1 In the later Carboniferous, Marattioid ferns for the first time occur with the sporangia united in a composite organ called a synangium. 1893 Bower in Philos. Trans. (Royal Soc.) B. 185 542 It is difficult to recognize..the exact limits of the sporogenous masses in the synangia. Derivatives synangial adj. /sɪˈnændʒɪəl/ = synangic adj. ΘΚΠ the world > life > the body > vascular system > blood vessel > artery > [adjective] > types of common1657 primitive1733 synangial1875 arteriolar1877 precerebral1967 1875 T. H. Huxley in Encycl. Brit. I. 765/1 Three thick semi~lunar valves are placed at the ventricular end of this region, and three others..at its synangial end. synangic adj. /sɪˈnændʒɪk/ pertaining to or constituting a synangium. ΘΚΠ the world > plants > particular plants > ferns > [adjective] > of or relating to parts of ferns indusiate1830 indusiform1857 indusiated1864 indusioid1866 soral1892 synangic1902 1902 C. Reid in Encycl. Brit. XXXI. 417/1 Numerous..fern-sporangia occur in the petrified material of the Carboniferous formation; the presence of an annulus is a frequent character.., while synangic sori are rare. 1902 C. Reid in Encycl. Brit. XXXI. 417/1 The genus Diplolabis of Renault..resembles Corynepteris in possessing a synangic fructification. This entry has not yet been fully updated (first published 1919; most recently modified version published online December 2018). < n.1875 |
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