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perature in degrees of the air thermometer, reckoned from its zero of expansion. -- Circular functions. See Inverse trigonometrical functions (below). -- Continuous function, a quantity that has no interruption in the continuity of its real values, as the variable changes between any specified limits. -- Discontinuo…

Any one of the Fungi, a large and very complex group of thallophytes of low organization, -- the molds, mildews, rusts, smuts, mushrooms, toadstools, puff balls, and the allies of each.

eveling of a surface, or the preparing of an air space, by means of strips of board or of larger pieces. See Fur, v. t., 3.

A large duck (Anas strepera), valued as a game bird, found in the northern parts of Europe and America; -- called also gray duck. [Written also gaddwell.]

The West Indian Sciadophyllum Brownei, a tree with very large digitate leaves.

A strong, light-draft, Dutch merchant vessel, carrying a mainmast and a mizzenmast, and a large gaff mainsail.

An excrescence of any form produced on any part of a plant by insects or their larvae. They are most commonly caused by small Hymenoptera and Diptera which puncture the bark and lay their eggs in the wounds. The larvae live within the galls. Some galls are due to aphids, mites, etc. See Gallnut.

A large galley, having some features of the galleon, as broadside guns; esp., such a vessel used by the southern nations of Europe in the 16th and 17th centuries. See Galleon, and Galley. [Written variously galeas, gallias, etc.]

s, and used for war or commerce. The term is often rather indiscriminately applied to any large sailing vessel. The gallens . . . were huge, round-stemmed, clumsy vessels, with bulwarks three or four feet thick, and built up at stem and stern, like castels. Motley.

A room for the exhibition of works of art; as, a picture gallery; hence, also, a large or important collection of paintings, sculptures, etc.

A large vessel for war and national purposes; -- common in the Middle Ages, and down to the 17th century.

A large mosquito.

A large umbrella; --said to allude to Mrs. Gamp's umbrella, in Dickens's "Martin Chuzzlewit."

ach.), a turning lathe with a deep notch in the bed to admit of turning a short object of large diameter. -- To stand in the gap, to expose one's self for the protection of something; to make defense against any assailing danger; to take the place of a fallen defender or supporter. -- To stop a gap, to secure a weak…

A large edible clam (Schizothærus Nuttalli), of the Pacific coast; -- called also gaper clam.

pike. See Alligator gar (under Alligator), and Gar pike. Gar pike, or Garpike (Zoöl.), a large, elongated ganoid fish of the genus Lepidosteus, of several species, inhabiting the lakes and rivers of temperate and tropical America.

One of several species of similar fishes of the genus Tylosurus, of which one species (T. marinus) is common on the Atlantic coast. T. Caribbæus, a very large species, and T. crassus, are more southern; - - called also needlefish. Many of the common names of the European garfish are also applied to the American species…

rio (L. Gasserius), the discover of the Gasserian ganglion. Gasserian ganglion (Anat.), a large ganglion, at the root of the trigeminal, or fifth cranial, nerve.

A genus of large eocene birds from the Paris basin.

A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the Gastræa theory of Haeckel. See G…