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A polygon or plane figure with nine sides and nine angles; a nonagon.

Having all the sides equal; as, an equilateral triangle; an equilateral polygon. Equilateral hyperbola (Geom.), one whose axes are equal. -- Equilateral shell (Zoöl.), one in which a transverse line drawn through the apex of the umbo bisects the valve, or divides it into two equal and symmetrical parts. -- Mutually e…

A white, crystalline hydrocarbon, regarded as a polymeric variety of ethylene, obtained in heavy oil of wine, the residue left after making ether; -- formerly called also concrete oil of wine.

An oily hydrocarbon regarded as a polymeric variety of ethylene, produced with etherin.

or kingdom. Exterior angle (Geom.), the angle included between any side of a triangle or polygon and the prolongation of the adjacent side; also, an angle included between a line crossing two parallel lines and either of the latter on the outside. -- Exterior side (Fort.), the side of the polygon upon which a front o…

Any moth of the genus Polypogon.

A genus of fossil corals abundant in the Silurian and Devonian rocks, having polygonal cells with perforated walls.

re falls into two great divisions, the first belonging rather to fetichism, the second to polytheism proper. Tylor.

A process by which certain coral polyps, echinoderms, annelids, etc., spontaneously subdivide, each individual thus forming two or more new ones. See Strobilation.

ncipal entrance. -- Front of fortification, the works constructed upon any one side of a polygon. Farrow. -- Front of operations, all that part of the field of operations in front of the successive positions occupied by the army as it moves forward. Farrow. -- To come to the front, to attain prominence or leadership…

A polyphonic composition, developed from a given theme or themes, according to strict contrapuntal rules. The theme is first given out by one voice or part, and then, while that pursues its way, it is repeated by another at the interval of a fifth or fourth, and so on, until all the parts have answered one by one, cont…

suspended from the cord at points between the fixed support and the pulley. -- Funicular polygon (Mech.), the polygonal figure assumed by a cord fastened at its extremities, and sustaining weights at different points.

The common English milkwort (Polygala vulgaris), so called from blossoming in gang week. Dr. Prior.

A polynuclear mass of protoplasm, not divided into separate cells, from which certain ova are developed. Balfour.

avorite food of geese; -- called also catchweed and cleavers. (b) A species of knotgrass (Polygonum aviculare). (c) The annual spear grass (Poa annua). -- Goose neck, anything, as a rod of iron or a pipe, curved like the neck of a goose; specially (Naut.), an iron hook connecting a spar with a mast. -- Goose quill, a…

An Australian parrakeet (Polytelis Barrabandi); -- called also the scarlet-breasted parrot.

at forking thallus and the fruit raised on peduncled and radiated receptacles (Marchantia polymorpha). -- Ground mail, in Scotland, the fee paid for interment in a churchyard. -- Ground mass (Geol.), the fine-grained or glassy base of a rock, in which distinct crystals of its constituents are embedded. -- Ground par…

A large and valuable food fish (Polyprion prognathus) of New Zealand. It sometimes weighs one hundred pounds or more.

A West Indian fern, the Polypodium Phyllitidis of Linnæus. It is also found in Florida.

Possessing the same number of factors of a given kind; as, a homogeneous polynomial.