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Acraspeda :: Acraspeda (n. pl.) A group of acalephs, including most of the larger jellyfishes; the Discophora..

Anoplura :: Anoplura (n. pl.) A group of insects which includes the lice.

Vestales :: Vestales (n. pl.) A group of butterflies including those known as virgins, or gossamer-winged butterflies..

Dyas :: Dyas (n.) A name applied in Germany to the Permian formation, there consisting of two principal groups..

Palladium :: Palladium (n.) A rare metallic element of the light platinum group, found native, and also alloyed with platinum and gold. It is a silver-white metal resembling platinum, and like it permanent and untarnished in the air, but is more easily fusible. It is unique in its power of occluding hydrogen, which it does to the extent of nearly a thousand volumes, forming the alloy Pd2H. It is used for graduated circles and verniers, for plating certain silver goods, and somewhat in dentistry. It was so na

Nicotidine :: Nicotidine (n.) A complex, oily, nitrogenous base, isomeric with nicotine, and obtained by the reduction of certain derivatives of the pyridine group..

Phocodontia :: Phocodontia (n. pl.) A group of extinct carnivorous whales. Their teeth had compressed and serrated crowns. It includes Squalodon and allied genera.

Coelenterata :: Coelenterata (n. pl.) A comprehensive group of Invertebrata, mostly marine, comprising the Anthozoa, Hydrozoa, and Ctenophora. The name implies that the stomach and body cavities are one. The group is sometimes enlarged so as to include the sponges..

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

Roup :: Roup (n.) A disease in poultry. See Pip.

Falconet :: Falconet (n.) One of a group of Australian birds of the genus Falcunculus, resembling shrikes and titmice..

Spray :: Spray (n.) A group of castings made in the same mold and connected by sprues formed in the runner and its branches.

Ortho- :: Ortho- () The one of several acids of the same element (as the phosphoric acids), which actually occurs with the greatest number of hydroxyl groups; as, orthophosphoric acid. Cf. Normal..

Subhastation :: Subgroup (n.) A subdivision of a group, as of animals..

Residue :: Residue (n.) That which remains of a molecule after the removal of a portion of its constituents; hence, an atom or group regarded as a portion of a molecule; -- used as nearly equivalent to radical, but in a more general sense..

Pleuroptera :: Pleuroptera (n. pl) A group of Isectivora, including the colugo..

Diamine :: Diamine (n.) A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide..

Chaetopoda :: Chaetopoda (n. pl.) A very extensive order of Annelida, characterized by the presence of lateral setae, or spines, on most or all of the segments. They are divided into two principal groups: Oligochaeta, including the earthworms and allied forms, and Polychaeta, including most of the marine species..

Ganocephala :: Ganocephala (n. pl.) A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes..

Ametabola :: Ametabola (n. pl.) A group of insects which do not undergo any metamorphosis.

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