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Triamine :: Triamine (n.) An amine containing three amido groups.

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..

Amidogen :: Amidogen (n.) A compound radical, NH2, not yet obtained in a separate state, which may be regarded as ammonia from the molecule of which one of its hydrogen atoms has been removed; -- called also the amido group, and in composition represented by the form amido..

Pleiades :: Pleiades (n. pl.) A group of small stars in the neck of the constellation Taurus.

Grouping :: Grouping (p. pr. & vb. n.) of Grou.

Lash :: Lash (n.) In carpet weaving, a group of strings for lifting simultaneously certain yarns, to form the figure..

Hypersthene :: Hypersthene (n.) An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface..

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..

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..

Ripidolite :: Ripidolite (n.) A translucent mineral of a green color and micaceous structure, belonging to the chlorite group; a hydrous silicate of alumina, magnesia, and iron; -- called also clinochlore..

Microcline :: Microcline (n.) A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form..

Cirrostomi :: Cirrostomi (n. pl.) The lowest group of vertebrates; -- so called from the cirri around the mouth; the Leptocardia. See Amphioxus.

Zeuzerian :: Zeuzerian (n.) Any one of a group of bombycid moths of which the genus Zeuzera is the type. Some of these moths are of large size. The goat moth is an example.

Rhipipter :: Rhipipter (n.) One of the Rhipiptera, a group of insects having wings which fold like a fan; a strepsipter..

Dodecane :: Dodecane (n.) Any one of a group of thick oily hydrocarbons, C12H26, of the paraffin series..

Cirripedia :: Cirripedia (n. pl.) An order of Crustacea including the barnacles. When adult, they have a calcareous shell composed of several pieces. From the opening of the shell the animal throws out a group of curved legs, looking like a delicate curl, whence the name of the group. See Anatifa..

Measure :: Measure (n.) The group or grouping of beats, caused by the regular recurrence of accented beats..

Tetraspore :: Tetraspore (n.) A nonsexual spore, one of a group of four regularly occurring in red seaweeds..

Genus :: Genus (n.) An assemblage of species, having so many fundamental points of structure in common, that in the judgment of competent scientists, they may receive a common substantive name. A genus is not necessarily the lowest definable group of species, for it may often be divided into several subgenera. In proportion as its definition is exact, it is natural genus; if its definition can not be made clear, it is more or less an artificial genus..

Class :: Class (n.) A group of individuals ranked together as possessing common characteristics; as, the different classes of society; the educated class; the lower classes..

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