(Zool.) The five united jaws and accessory ossicles of certain sea urchins. [ 1913 Webster ]

[ See Berenice's Locks, in Dictionary of Noted Names in Fiction. ] (Astron.) See Coma Berenices, under Coma. [ Webster 1913 Suppl. ]

See under Law. [ 1913 Webster ]

n. 1. (Bot.) The geranium; -- so named from the long axis of the fruit, which resembles the beak of a crane. Dr. Prior. [ 1913 Webster ]

2. (Surg.) A pair of long-beaked forceps. [ 1913 Webster ]

n. (Bot.) (a) A small annual species of Geranium, native in England; -- so called from the shape of the leaf. (b) The columbine. [ Prov. Eng. ] Halliwell. [ 1913 Webster ]

n. See Forkbeard. [ 1913 Webster ]

n. (Bot.) An umbelliferous plant (Bupleurum rotundifolium); -- so named from the shape of its leaves. Dr. Prior. [ 1913 Webster ]

(Bot.) A species of fern (Davallia Canariensis) with a soft, gray, hairy rootstock; -- whence the name. [ 1913 Webster ]

n. (Bot.) A kind of grass (Eriophorum vaginatum). See Cotton grass, under Cotton. [ 1913 Webster ]

Hare's-tail grass (Bot.), a species of grass (Lagurus ovatus) whose head resembles a hare's tail. [ 1913 Webster ]

[ So called from the inventor. ] (Mach.) Spur gearing having teeth slanting across the face of the wheel, sometimes slanting in opposite directions from the middle. [ 1913 Webster ]

[ So called from the inventor. ] (Mach.) A universal joint. See under Universal. [ 1913 Webster ]

(Thermodynamics) The cycle for the air engine proposed by Joule. In it air is taken by a pump from a cold chamber and compressed adiabatically until its pressure is eqal to that of the air in a hot chamber, into which it is then delivered, thereby displacing an equal amount of hot air into the engine cylinder. Here it expands adiabatically to the temperature of the cold chamber into which it is finally exhausted. This cycle, reversed, is used in refrigerating machines. [ Webster 1913 Suppl. ]

. 1. (Elec.) The law that the rate at which heat is produced in any part of an electric circuit is measured by the product of the square of the current times the resistance of that part of the circuit. If the current (i) is constant for an interval of time (t), the energy (H) in heat units equals i2Rt, R being resistance. [ Webster 1913 Suppl. ]

2. (Thermodynamics) The law that there is no change of temperature when a gas expands without doing external work and without receiving or rejecting heat. [ Webster 1913 Suppl. ]

pos>n. [ From Labarraque, a Parisian apothecary. ] (Med.) An aqueous solution of sodium hypochlorite, extensively used as a disinfectant. [ 1913 Webster ]

Sodium hypochlorite is the same compound used in the commercial trademarked bleach Clorox(TM). It has both disinfectant and bleaching activity. [ PJC ]

n. A supposed discovery which turns out to be a hoax; something grossly absurd. [ 1913 Webster ]

2. A confused multitude of things.
Syn. -- clutter, jumble, muddle, welter, smother. [ WordNet 1.5 ]

n. 1. A long streaky cloud, spreading out like a horse's tail, and believed to indicate rain; a cirrus cloud. See Cloud. [ 1913 Webster ]

Mackerel sky and mare's-tails
Make tall ships carry low sails. Old Rhyme. [ 1913 Webster ]

2. (Bot.) An aquatic plant of the genus Hippuris (Hippuris vulgaris), having narrow leaves in whorls. [ 1913 Webster ]

(Physics.) See Boyle's law, under Law. [ 1913 Webster ]

(Med.) A disease characterized by deafness and vertigo, resulting in incoordination of movement. It is supposed to depend upon a morbid condition of the semicircular canals of the internal ear. Named after Ménière, a French physician. [ 1913 Webster ]

(Photog.) A process, now no longer used, invented by J. N. Niepce, a French chemist, in 1829. It depends upon the action of light in rendering a thin layer of bitumen, with which the plate is coated, insoluble. [ Obsolescent ] [ Webster 1913 Suppl. ]

A process for preserving timber and rendering it incombustible by impregnating it successively with solutions of sulphate of iron and calcium chloride in vacuo. -- Payn"ize, v. t. [Webster 1913 Suppl.]

[ After a Hawaiian goddess associated with the crater Kilauea. ] Glass threads or fibers formed by the wind from bits blown from frothy lava or from the tips of lava jets or from bits of liquid lava thrown into the air. It often collects in thick masses resembling tow. [ Webster 1913 Suppl. ]

A form of cooperative bank, such as those of Germany; -- a term loosely used for various forms of cooperative financial institutions. [ Webster 1913 Suppl. ]

. (U. S. Politics) A party formed in 1891, advocating an increase of the currency, public ownership and operation of railroads, telegraphs, etc., an income tax, limitation in ownership of land, etc. [ Webster 1913 Suppl. ]

A long-handled brush for dusting ceilings, etc., also for washing windows. [ Cant ] [ Webster 1913 Suppl. ]

[ From J. E. Purkinje, their discoverer. ] (Anat.) Large ganglion cells forming a layer near the surface of the cerebellum. [ 1913 Webster ]

v. t. To punish with a rope's end. [ 1913 Webster ]

[ See Scheelite. ] (Chem.) See under Green. [ 1913 Webster ]

n. (Bot.) The Guinea-hen flower; -- so called in England because its spotted petals resemble the scales of a snake's head. Dr. Prior. [ 1913 Webster ]

Snake's-head iris (Bot.), an iridaceous plant (Hermodactylus tuberosus) of the Mediterranean region. The flowers slightly resemble a serpent's open mouth. [ 1913 Webster ]

n. (Bot.) Same as Adder's-tongue. [ 1913 Webster ]

(Elec.) See under Bridge. [ 1913 Webster ]

. (Acoustics) Flexible rods the period of vibration of which in two planes at right angles are in some exact ratio to one another. When one end of such a rod is fixed, the free end describes in vibrating the corresponding Lissajous figure. So called because devised by Sir Charles Wheatstone. [ Webster 1913 Suppl. ]