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Salt :: salt () Sulphate of magnesia having cathartic qualities; -- originally prepared by boiling down the mineral waters at Epsom, England, -- whence the name; afterwards prepared from sea water; but now from certain minerals, as from siliceous hydrate of magnesia..

Hydras :: Hydras (pl. ) of Hydr.

Slickens :: Slickens (n.) The pulverized matter from a quartz mill, or the lighter soil of hydraulic mines..

Hydracid :: Hydracid (n.) An acid containing hydrogen; -- sometimes applied to distinguish acids like hydrochloric, hydrofluoric, and the like, which contain no oxygen, from the oxygen acids or oxacids. See Acid..

Lake :: Lake (n.) A pigment formed by combining some coloring matter, usually by precipitation, with a metallic oxide or earth, esp. with aluminium hydrate; as, madder lake; Florentine lake; yellow lake, etc..

Gibbsite :: Gibbsite (n.) A hydrate of alumina.

Thecophora :: Thecophora (n. pl.) A division of hydroids comprising those which have the hydranths in thecae and the gonophores in capsules. The campanularians and sertularians are examples. Called also Thecata. See Illust. under Hydroidea.

Zoochlorella :: Zoochlorella (n.) One of the small green granulelike bodies found in the interior of certain stentors, hydras, and other invertebrates..

Humin :: Humin (n.) A bitter, brownish yellow, amorphous substance, extracted from vegetable mold, and also produced by the action of acids on certain sugars and carbohydrates; -- called also humic acid, ulmin, gein, ulmic or geic acid, etc..

Jack :: "Jack (n.) A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack..

Hydrarthrosis :: Hydrarthrosis (n.) An effusion of watery liquid into the cavity of a joint.

Thiophenol :: Thiophenol (n.) A colorless mobile liquid, C6H5.SH, of an offensive odor, and analogous to phenol; -- called also phenyl sulphydrate..

Bud :: Bud (n.) A small protuberance on certain low forms of animals and vegetables which develops into a new organism, either free or attached. See Hydra..

Hydra :: Hydra (n.) Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort..

Fahlunite :: Fahlunite (n.) A hydration of iolite.

Chloral :: Chloral (n.) Chloral hydrate.

Hydra :: Hydra (n.) Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker..

Accumulator :: Accumulator (n.) An apparatus by means of which energy or power can be stored, such as the cylinder or tank for storing water for hydraulic elevators, the secondary or storage battery used for accumulating the energy of electrical charges, etc..

Isogonism :: Isogonism (n.) The quality of having similar sexual zooids or gonophores and dissimilar hydrants; -- said of certain hydroids.

Hydraulicon :: Hydraulicon (n.) An ancient musical instrument played by the action of water; a water organ.

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