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One of a pair of broad plates, developed from the outer maxillipeds of crabs, and forming a cover for the other mouth organs.

A pointed instrument used to urge on a beast; hence, any necessity that urges or stimulates. The daily goad urging him to the daily toil. Macaulay.

ods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic.

To collect or be formed into grains; as, cane juice granulates into sugar.

usually nine in number, of small iron balls, put together by means of cast-iron circular plates at top and bottom, with two rings, and a central connecting rod, in order to be used as a charge for a cannon. Formerly grapeshot were inclosed in canvas bags.

The man who manipulates a grip.

Pertaining to the gula or throat; as, gular plates. See Illust. of Bird, and Bowfin.

ognath 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.

The slender recoil spring which regulates the motion of the balance in a timepiece.

pertaining to or designating plates, processes, or the pictures made by them, in which gradation of tone in the photograph is reproduced by a graduated system of dotted and checkered spots, usually nearly invisible to the unaided eye, produced by the interposition between the camera and the object of a screen. The name…

Relating to harmony, -- as melodic relates to melody; harmonious; esp., relating to the accessory sounds or overtones which accompany the predominant and apparent single tone of any string or sonorous body.

hich the sound, which resembled the oboe, was produced by the vibration of thin metallic plates, acted upon by blowing through a tube.

A process of hardening the face of steel, as armor plates, invented by Hayward A. Harvey of New Jersey, consisting in the additional carburizing of the face of a piece of low carbon steel by subjecting it to the action of carbon under long-continued pressure at a very high heat, and then to a violent chilling, as by a…

gregate surface exposed to fire or to the heated products of combustion, esp. of all the plates or sheets that are exposed to water on their opposite surfaces; -- called also fire surface.

A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.

The act of measuring the velocity with which the blood circulates in the arteries; hæmotachometry.

d geckoes of the genus Hemidactylus. The hemidactyls have dilated toes, with two rows of plates beneath.

The sulphate of iodoquinine, a substance crystallizing in thin plates remarkable for their effects in polarizing light.

The natural history of reptiles; that branch of zoölogy which relates to reptiles, including their structure, classification, and habits.

le formed by the meeting of two sloping sides or skirts of a roof, which have their wall plates running in different directions.