| 释义 |
blue-green, a. and n.
Brit. |ˌblʊːˈgriːn|, U.S. |ˈblʊˈgrin|
[‹ blue adj. + green adj.]
A. adj.
1. Of a colour intermediate between blue and green.
1764J. Grainger Sugar-cane 54 Till tardy morn unbar the gates of light..And, opening on the main with sultry beam, To burnish'd silver turns the blue-green wave. 1852L. G. Clark Knick-knacks from Editor's Table No. 2. 59 He wore..a pair of leather-rimmed spectacles, with round blue-green glasses, as if cut from a coarse window-pane. 1872‘G. Eliot’ Middlemarch II. iv. xxxvii. 270 Any private hours in her day were usually spent in her blue-green boudoir. 1905E. M. Forster Where Angels fear to Tread iii. 2 Leagues of olive-trees and vineyards and blue-green hills to watch you. 1968F. Exley Fan's Notes 368 In the afternoons I lay face up on a water mattress and watched the compact white clouds run down the sky, or face down looked into the blue-green water. 2001P. Ball Bright Earth iii. 71 The blue-green pigment verdigris (copper acetate) was made in a similar process, by corroding copper metal with vinegar fumes.
B. n.
1. A colour intermediate between blue and green; a pigment of this colour.
1845Lady's Bk. Dec. 232/1 The green of the Niagara falls is indeed like nothing that can be seen elsewhere. It is not the green of the sea in fathom water, nor the deep blue-green of the lakes. 1907Catholic Encycl. 74 The chief colours are deep gold in the rays and stars, blue green in the mantle, and rose in the flowered tunic. 1994A. Theroux Primary Colors 4 The Greeks called the color kyanos (hence ‘cyan’) while the Romans would call it caeruleus, a name still used today for the artificial blue-green made from cobalt stannate.
2. = blue-green alga n. at Special uses 2.
1896Bot. Gaz. 21 144 Camphor water is not very favorable for [the preservation of] many blue-greens. 1920Bull. Torrey Bot. Club 47 94 The seaweeds of the four great natural groups of algae (the blue-greens, the greens, the browns, and the reds) differ considerably in their light requirements. 1997G. S. Helfman et al. Diversity of Fishes xxiv. 435/2 A fish–snail–epiphyte–macrophyte cascade was found in a Tennessee lake where redear sunfish (Lepomis microlophus) ate snails that grazed on epiphytes (filamentous blue-greens and diatoms) that normally infest lake weeds.
Special uses. blue-green alga n. a microorganism of the former algal division Cyanophyta, now classified in the division Cyanobacteria; a cyanobacterium; usu. in pl.
[1880C. E. Bessey Bot. 215 Class Cyanophyceae... These are blue-green, verdigris-green, brownish-green, or rarely purple or red Protophytes, which in addition to chlorophyll, contain a soluble colouring-matter—phycocyanine—and a less soluble one—phycoxanthine.] 1890T. S. Smithson Pond-life ii. 15 Cyanophyceæ, or *blue-green Algæ. The plants in this order contain no pure chlorophyll. 1937J. E. Tilden Algae & their Life Relations 25 It is assumed that the progenitors of the blue-green algae came into being during the period of weakest illumination, the Cyanophycean period. 1999T. Pratchett et al. Sci. of Discworld xxiv. 173 Modern so-called blue-green algae are usually red or brown, but the ancient ones probably were blue-green. |