Amethyst :: Amethyst () A variety of crystallized quartz, of a purple or bluish violet color, of different shades. It is much used as a jeweler's stone..

Amethyst :: Amethyst () A purple color in a nobleman's escutcheon, or coat of arms..

Amethystine :: Amethystine (a.) Resembling amethyst, especially in color; bluish violet..

Amethystine :: Amethystine (a.) Composed of, or containing, amethyst..

Oxamethylane :: Oxamethylane (n.) Methyl oxamate, obtained as a pearly white crystalline substance..

Pentamethylene :: Pentamethylene (n.) A hypothetical hydrocarbon, C5H10, metameric with the amylenes, and the nucleus of a large number of derivatives; -- so named because regarded as composed of five methylene residues. Cf. Trimethylene, and Tetramethylene..

Tetramethylene :: Tetramethylene (n.) A hypothetical hydrocarbon, C4H8, analogous to trimethylene, and regarded as the base of well-known series or derivatives..

Tetramethylene :: Tetramethylene (n.) Sometimes, an isomeric radical used to designate certain compounds which are really related to butylene..

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