Definition of tetrad

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Tetrad (n.) The number four; a collection of four things; a quaternion.

Lern More About Tetrad

Tetradynamian :: Tetradynamian (a.) Alt. of Tetradynamou.
Tamandu :: Tamandu (n.) A small ant-eater (Tamandua tetradactyla) native of the tropical parts of South America.
Tetradymite :: Tetradymite (n.) A telluride of bismuth. It is of a pale steel-gray color and metallic luster, and usually occurs in foliated masses. Called also telluric bismuth..
Phatagin :: Phatagin (n.) The long-tailed pangolin (Manis tetradactyla); -- called also ipi.
Tetradactyle :: Tetradactyle (a.) Tetradactylous.
Tetradactyl :: Tetradactyl (a.) Alt. of Tetradactyl.
Valence :: Valence (n.) The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four..
Tetradynamia :: Tetradynamia (n. pl.) A Linnaean class of plants having six stamens, four of which are longer than the others..
Amphipoda :: Amphipoda (n. pl.) A numerous group of fourteen -- footed Crustacea, inhabiting both fresh and salt water. The body is usually compressed laterally, and the anterior pairs or legs are directed downward and forward, but the posterior legs are usually turned upward and backward. The beach flea is an example. See Tetradecapoda and Arthrostraca..
Tetradynamian :: Tetradynamian (n.) A plant of the order Tetradynamia.
Tetradactylous :: Tetradactylous (a.) Having, or characterized by, four digits to the foot or hand..
Tetradon :: Tetradon (n.) See Tetrodon.
Tetradecane :: Tetradecane (n.) A light oily hydrocarbon, C14H30, of the marsh-gas series; -- so called from the fourteen carbon atoms in the molecule..
Gymnodont :: Gymnodont (n.) One of a group of plectognath fishes (Gymnodontes), having the teeth and jaws consolidated into one or two bony plates, on each jaw, as the diodonts and tetradonts. See Bur fish, Globefish, Diodon..
Tetradic :: Tetradic (a.) Of or pertaining to a tetrad; possessing or having the characteristics of a tetrad; as, a carbon is a tetradic element..
Tetrad :: Tetrad (n.) A tetravalent or quadrivalent atom or radical; as, carbon is a tetrad..
Tetradite :: Tetradite (n.) A person in some way remarkable with regard to the number four, as one born on the fourth day of the month, or one who reverenced four persons in the Godhead..
Arthrostraca :: Arthrostraca (n. pl.) One of the larger divisions of Crustacea, so called because the thorax and abdomen are both segmented; Tetradecapoda. It includes the Amphipoda and Isopoda..
Tetradrachma :: Tetradrachma (n.) A silver coin among the ancient Greeks, of the value of four drachms..
Tetrad :: Tetrad (n.) The number four; a collection of four things; a quaternion.
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