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Speedwell :: Speedwell (n.) Any plant of the genus Veronica, mostly low herbs with pale blue corollas, which quickly fall off..

Water Sapphire :: Water sapphire () A deep blue variety of iolite, sometimes used as a gem; -- called also saphir d'eau..

Self-heal :: Self-heal (n.) A blue-flowered labiate plant (Brunella vulgaris); the healall.

Indigo :: Indigo (n.) A blue dyestuff obtained from several plants belonging to very different genera and orders; as, the woad, Isatis tinctoria, Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. It is a dark blue earthy substance, tasteless and odorless, with a copper-violet luster when rubbed. Indigo does not exist in the plants as such, but is obtained by decomposition of the glycoside indican..

Haemacyanin :: Haemacyanin (n.) A substance found in the blood of the octopus, which gives to it its blue color..

Forget-me-not :: Forget-me-not (n.) A small herb, of the genus Myosotis (M. palustris, incespitosa, etc.), bearing a beautiful blue flower, and extensively considered the emblem of fidelity..

Indium :: Indium (n.) A rare metallic element, discovered in certain ores of zinc, by means of its characteristic spectrum of two indigo blue lines; hence, its name. In appearance it resembles zinc, being white or lead gray, soft, malleable and easily fusible, but in its chemical relation it resembles aluminium or gallium. Symbol In. Atomic weight, 113.4..

Suggillation :: Suggillate (v. t.) To beat livid, or black and blue..

Perchromic :: Perchromic (a.) Pertaining to, or designating, a certain one of the highly oxidized compounds of chromium, which has a deep blue color, and is produced by the action of hydrogen peroxide..

Crimson :: Crimson (n.) A deep red color tinged with blue; also, red color in general..

Pers :: Pers (a.) Light blue; grayish blue; -- a term applied to different shades at different periods.

Cyanine :: Cyanine (n.) One of a series of artificial blue or red dyes obtained from quinoline and lepidine and used in calico printing.

Bonito :: Bonito (n.) The skipjack (Sarda Mediterranea) of the Atlantic, an important and abundant food fish on the coast of the United States, and (S. Chilensis) of the Pacific, and other related species. They are large and active fishes, of a blue color with black oblique stripes..

Troilus :: Troilus (n.) A large, handsome American butterfly (Euph/ades, / Papilio, troilus). It is black, with yellow marginal spots on the front wings, and blue spots on the rear wings..

Sanders-blue :: Sanders-blue (n.) See Saunders-blue.

Isatin :: Isatin (n.) An orange-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo..

Fluorescence :: Fluorescence (n.) That property which some transparent bodies have of producing at their surface, or within their substance, light different in color from the mass of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it. The light emitted by fluorescent substances is in general of lower refrangibility than the incident l

Blue Book :: Blue book () A parliamentary publication, so called from its blue paper covers..

Smalt-blue :: Smalt-blue (a.) Deep blue, like smalt..

Pyocyanin :: Pyocyanin (n.) A blue coloring matter found in the pus from old sores, supposed to be formed through the agency of a species of bacterium (Bacillus pyocyaneus)..

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