blue-greenn.adj.

1659 J. Sparrow tr. J. Böhme Fifth Bk. Authour ii. iii. 130 A Glimps of such a Spirit, in a high deep blew green and mixed Colour.

1705 tr. Whole Art of Dying 69 The Ware must first be Dyed a deep blew Green.

1738 J. Hoofnail New Pract. Improvem. Exper. Colours 16 The Surface discovered a faint Resemblance of a Blue Green.

1845 Godey's Lady'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.

1882 Chem. News 4 Aug. 51/1 A red-orange is complementary of a blue-green.

1910 Catholic Encycl. VII. 44/1 The chief colours are deep gold in the rays and stars, blue green in the mantle, and rose in the flowered tunic.

1994 A. 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.

2006 L. Eiseman Color: Messages & Meanings 78/2 By tweaking a true green to a blue green, an interesting new dimension is added.

1896 Bot. Gaz. 21 144 Camphor water is not very favorable for [the preservation of] many blue-greens.

1920 Bull. 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.

1991 New Scientist 9 Mar. 38/1 They are highly productive, and their growths are variously called blue-green mats, cyanophyta mats or cyanobacterial mats.

2003 N. Calder Magic Universe 533 Blue-greens are commonplace in ponds and oceans.

1704 Dict. Rusticum at Anemone As for the small Leaved Anemonies... of the best of these are... 13. Bright blue green.

1764 J. 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.

1852 L. 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.

1905 E. M. Forster Where Angels fear to Tread iii. 2 Leagues of olive-trees and vineyards and blue-green hills to watch you.

1968 F. 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.

2001 P. 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.

1880 S. H. Vines tr. K. Prantl Elem. Text-bk. Bot. iv. 106 Phycochromaceæ or blue-green Algæ.

1937 J. 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.

1986 T. C. Fuller & E. C. McClintock Poisonous Plants Calif. 12 The blue-green alga Anabaena flos-aquae can become abundant in stagnant waters in summer months.

2006 A. G. van der Valk Biol. Freshwater Wetlands iii. 43 Those members of the plankton that are either true algae or blue-green algae are called phytoplankton.