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Xanthinine :: Xanthinine (n.) A complex nitrogenous substance related to urea and uric acid, produced as a white powder; -- so called because it forms yellow salts, and because its solution forms a blue fluorescence like quinine..

Gentian :: Gentian (n.) Any one of a genus (Gentiana) of herbaceous plants with opposite leaves and a tubular four- or five-lobed corolla, usually blue, but sometimes white, yellow, or red. See Illust. of Capsule..

Blue :: Blue (superl.) Low in spirits; melancholy; as, to feel blue..

Bluebell :: Bluebell (n.) A plant of the genus Scilla (Scilla nutans).

Isatis :: Isatis (n.) A genus of herbs, some species of which, especially the Isatis tinctoria, yield a blue dye similar to indigo; woad..

Synthesis :: Synthesis (n.) The art or process of making a compound by putting the ingredients together, as contrasted with analysis; thus, water is made by synthesis from hydrogen and oxygen; hence, specifically, the building up of complex compounds by special reactions, whereby their component radicals are so grouped that the resulting substances are identical in every respect with the natural articles when such occur; thus, artificial alcohol, urea, indigo blue, alizarin, etc., are made by synthesis..

Deerberry :: Deerberry (n.) A shrub of the blueberry group (Vaccinium stamineum); also, its bitter, greenish white berry; -- called also squaw huckleberry..

Neutral :: Neutral (a.) Having neither acid nor basic properties; unable to turn red litmus blue or blue litmus red; -- said of certain salts or other compounds. Contrasted with acid, and alkaline..

True-blue :: True-blue (a.) Of inflexible honesty and fidelity; -- a term derived from the true, or Coventry, blue, formerly celebrated for its unchanging color. See True blue, under Blue..

Purple :: Purple (n.) A color formed by, or resembling that formed by, a combination of the primary colors red and blue..

Pitta :: Pitta (n.) Any one of a large group of bright-colored clamatorial birds belonging to Pitta, and allied genera of the family Pittidae. Most of the species are varied with three or more colors, such as blue, green, crimson, yellow, purple, and black. They are called also ground thrushes, and Old World ant thrushes; but they are not related to the true thrushes..

Pastel :: Pastel (n.) A plant affording a blue dye; the woad (Isatis tinctoria); also, the dye itself..

Blueness :: Blueness (n.) The quality of being blue; a blue color.

Heckimal :: Heckimal (n.) The European blue titmouse (Parus coeruleus).

Nun :: Nun (n.) The European blue titmouse.

Cyanophyll :: Cyanophyll (n.) A blue coloring matter supposed by some to be one of the component parts of chlorophyll.

Azure :: Azure (v. t.) To color 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..

Blonde :: Blonde (n.) A person of very fair complexion, with light hair and light blue eyes..

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

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