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A screw cut on a solid whose sides are arcs of the periphery of a wheel into the teeth of which the screw is intended to work. It is named from the person who first used the form.

A soluble ferment occurring in the animal body, to the presence of which many normal decompositions and synthetical processes are supposed to be due.

A short, sharp-pointed, large-headed nail, -- used in shoeing houses and for studding the soles of heavy shoes.

An American sole (Achirus lineatus, or A. achirus), related to the European sole, but of no market value.

A hollow place or cavity; an excavation; a pit; an opening in or through a solid body, a fabric, etc.; a perforation; a rent; a fissure. The holes where eyes should be. Shak. The blind walls Were full of chinks and holes. Tennyson. The priest took a chest, and bored a hole in the lid. 2 Kings xii. 9.…

Having an empty space or cavity, natural or artificial, within a solid substance; not solid; excavated in the interior; as, a hollow tree; a hollow sphere. Hollow with boards shalt thou make it. Ex. xxvii. 8..

Wholly solid; -- said of a barometer constructed of solid materials to show the variations of atmospheric pressure without the use of liquids, as the aneroid.

ed; reserved from profane or common use; holy vessels; a holy priesthood. "Holy rites and solemn feasts." Milton.

A heavy-armed infantry soldier. Milford.

Mounted soldiery; cavalry; -- used without the plural termination; as, a regiment of horse; -- distinguished from foot. The armies were appointed, consisting of twenty-five thousand horse and foot. Bacon.

A mounted soldier; a cavalryman.

marked; the dial. Locke. -- Sidereal hour, the twenty-fourth part of a sidereal day. -- Solar hour, the twenty-fourth part of a solar day. -- The small hours, the early hours of the morning, as one o'clock, two o'clock, etc. -- To keep good hours, to be regular in going to bed early.

The space taken out of one solid, to admit the insertion of part of another, as the end of one timber in the side of another.

To treat with insolence and arrogance; to chide or rebuke with insolence; to hector; to bully. You must not presume to huff us. Echard.

d. The noise of battle hurtled in the air. Shak. The earthquake sound Hurtling 'death the solid ground. Mrs. Browning.

ese elements. Hydriodic acid (Chem.), a pungent, colorless gas, HI, usually prepared as a solution in water. It is strong reducing agent. Called also hydrogen iodine.

ydrobromic acid (Chem.), a colorless, pungent, corrosive gas, HBr, usually collected as a solution in water. It resembles hydrochloric acid, but is weaker and less stable. Called also hydrogen bromide.

on common salt. It has a great affinity for water, and the commercial article is a strong solution of the gas in water. It is a typical acid, and is an indispensable agent in commercial and general chemical work. Called also muriatic, and chlorhydric, acid.

It is produced by the action of sulphuric acid on fluorite, and is usually collected as a solution in water. It attacks all silicates, as glass or porcelain, is the agent employed in etching glass, and is preserved only in vessels of platinum, lead, caoutchouc, or gutta-percha.

ing the specific gravities of liquids, and thence the strength spirituous liquors, saline solutions, etc.