| 释义 |
‖ synangium|sɪˈnændʒɪəm|
Pl. -ia. Also anglicized synange |ˈsɪnændʒ|.
[mod.L., f. Gr. σύν syn-1 + ἀγγεῖον vessel.]
1. Anat. and Zool. A collective or common blood-vessel from which several arteries branch; spec. the terminal part of the arterial trunk in the lower vertebrates.
1875Huxley 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. 1875Huxley & Martin Elem. Biol. (1877) 176 The terminal part common to the divergent trunks is the synangium.
2. Bot. The oblong mass of coherent sporangia in ferns of the order Marattiaceæ.
1881J. 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. 1893Bower in Phil. Trans. B. CLXXXV. 542 It is difficult to recognize..the exact limits of the sporogenous masses in the synangia.
Hence synangial |sɪˈnændʒɪəl|, synangic |sɪˈnændʒɪk| adjs., pertaining to or constituting a synangium.
1875Huxley 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. 1902C. Reid Ibid. 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. Ibid., The genus Diplolabis of Renault..resembles Corynepteris in possessing a synangic fructification. |