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Ruthenium :: Ruthenium (n.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum..

Coelodont :: Coelodont (a.) Having hollow teeth; -- said of a group lizards.

Desmidian :: Desmidian (n.) A microscopic plant of the family Desmidiae, a group of unicellular algae in which the species have a greenish color, and the cells generally appear as if they consisted of two coalescing halves..

Pharyngopneusta :: Pharyngopneusta (n. pl.) A group of invertebrates including the Tunicata and Enteropneusta.

Anthropidae :: Anthropidae (n. pl.) The group that includes man only.

Parvoline :: Parvoline (n.) A liquid base, C/H/N, of the pyridine group, found in coal tar; also, any one of the series of isometric substances of which it is the type..

Melanochroi :: Melanochroi (n. pl.) A group of the human race, including the dark whites..

Chlorite :: Chlorite (n.) The name of a group of minerals, usually of a green color and micaceous to granular in structure. They are hydrous silicates of alumina, iron, and magnesia..

Rhynchophora :: Rhynchophora (n. pl.) A group of Coleoptera having a snoutlike head; the snout beetles, curculios, or weevils..

Prognathi :: Prognathi (n. pl.) A comprehensive group of mankind, including those that have prognathous jaws..

Chromophore :: Chromophore (n.) Any chemical group or residue (as NO2; N2; or O2) which imparts some decided color to the compound of which it is an ingredient.

Substitute :: Substituent (n.) Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed..

Micronesian :: Micronesian (a.) Of or pertaining to Micronesia, a collective designation of the islands in the western part of the Pacific Ocean, embracing the Marshall and Gilbert groups, the Ladrones, the Carolines, etc..

Terrane :: Terrane (n.) A group of rocks having a common age or origin; -- nearly equivalent to formation, but used somewhat less comprehensively..

Verbal :: Verbal (a.) Of or pertaining to a verb; as, a verbal group; derived directly from a verb; as, a verbal noun; used in forming verbs; as, a verbal prefix..

Violaniline :: Violaniline (n.) A dyestuff of the induline group, made from aniline, and used as a substitute for indigo in dyeing wool and silk a violet-blue or a gray-blue color..

Metazoa :: Metazoa (n. pl.) Those animals in which the protoplasmic mass, constituting the egg, is converted into a multitude of cells, which are metamorphosed into the tissues of the body. A central cavity is commonly developed, and the cells around it are at first arranged in two layers, -- the ectoderm and endoderm. The group comprises nearly all animals except the Protozoa..

Quaternion :: Quaternion (n.) A set of four parts, things, or person; four things taken collectively; a group of four words, phrases, circumstances, facts, or the like..

Lyrid :: Lyrid (n.) One of the group of shooting stars which come into the air in certain years on or about the 19th of April; -- so called because the apparent path among the stars the stars if produced back wards crosses the constellation Lyra.

Arctoidea :: Arctoidea (n. pl.) A group of the Carnivora, that includes the bears, weasels, etc..

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