| 单词 |
conferva |
| 释义 |
‖ conferva Bot.|kənˈfɜːvə|
Pl. confervæ |-viː|.
[L. conferva, some kind of water plant with healing virtues mentioned by Pliny, perh. comfrey.]
A genus of plants originally constituted by Dillenius, and then made to contain many heterogeneous species of filamentous cryptogams; now restricted to certain fresh-water Green Algæ (Chlorophyllæ), composed of simple (i.e. unbranched) many-celled filaments, and reproduced by zoospores. One of the most familiar species is popularly known as Crow-silk.
[1640J. Parkinson Theatr. Bot. 1261 Pliny hath recorded that he knew of one cured incredible quickly, with his Conferva.] 1757Ellis in Phil. Trans. L. 285 It appears to be a geniculated red conferva. 1830Lyell Princ. Geol. I. 207 The banks..are every where covered with reeds, lichen, confervæ, and various kinds of aquatic vegetables. 1854Hooker Himal. Jrnls. I. xvi. 371 The rocks..were covered with a red conferva. 1882Vines Sachs' Bot. 355 Air-cavities, from the bottom of which the cells containing chlorophyll spring in a conferva-like manner. |
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单词 confervaceous 释义 confervaceous, a. Bot.|knfves|[f. prec. + -aceous.]Of the nature o......