| 单词 |
palmellaceous |
| 释义 |
palmellaceous, a. Bot.|pælmɛˈleɪʃəs|
[f. mod.L. Palmellāce-æ fem. pl. + -ous.]
Belonging to the Palmellaceæ, a doubtful family of fresh-water Algæ (typical genus Palmella), consisting of simple cells, of various colours, with thick jelly-like integument, and multiplying by cell-division; supposed by some to be transitional states of some undetermined higher plants. So palˈmellin [-in1], a red colouring matter found in Palmella cruenta; palˈmelloid a. [-oid], resembling or apparently akin to the genus Palmella.
1877Q. Jrnl. Microsc. Sci. XVII. 185 On a ‘palmelloid’ modification of Stigeoclonium. [1878W. R. McNab Bot. 54 The algae were formerly known as the green gonidia of the lichen thallus, and belong chiefly to the Palmellaceae with chlorophyll.] 1881Philadelphia Rec. No. 3455. 6 Substances which he had succeeded in extracting from fresh-water algae. They are palmelline, xanthophyll, chlorophyll and characine. 1890Cooke Freshw. Algæ iv. 41 Considerable surfaces are covered with a palmelloid growth. |
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