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To make rare, thin, porous, or less dense; to expand or enlarge without adding any new portion of matter to; -- opposed to condense.

ng through it, tending to choke or diminish the current, or the similar influence of a condenser; inductive resistance. Reactance is measured in ohms. The reactance of a circuit is equal to the component of the impressed electro-motive force at right angles to the current divided by the current, that is, the component…

ty; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refrcts the rays of light as they pass into it from a rare medium.

m that through which it has previously moved. Refraction out of the rarer medium into the denser, is made towards the perpendicular. Sir I. Newton.

, a vessel filled with cold water, surrounding the worm, the vapor in which is thereby condensed.

A summing up; a condensed statement; an abridgment or brief recapitulation. The exellent little résumé thereof in Dr. Landsborough's book. C. Kingsley.

ith yellow flowers, especially the European H. vulgare and the American frostweed, H. Canadense. Cretan rockrose, a related shrub (Cistus Creticus), one of the plants yielding the fragrant gum called ladanum.

-- Spike rush, any rushlike plant of the genus Eleocharis, in which the flowers grow in dense spikes. -- Sweet rush, a sweet-scented grass of Arabia, etc. (Andropogon schoenanthus), used in Oriental medical practice. -- Wood rush, any plant of the genus Luzula, which differs in some technical characters from Juncus…

A kind of tick trefoil (Desmodium Canadense). [Canada]

An American fresh-water food fish (Stizostedion Canadense); -- called also gray pike, blue pike, hornfish, land pike, sand pike, pickering, and pickerel.

Resembling the tail of a squirrel; -- generally said of branches which are close and dense, or of spikes of grass like barley.

nd Scotchman. -- Scotch fiddle, the itch. [Low] Sir W. Scott. -- Scotch mist, a coarse, dense mist, like fine rain. -- Scotch nightingale (Zoöl.), the sedge warbler. [Prov. Eng.] -- Scotch pebble. See under pebble. -- Scotch pine (Bot.) See Riga fir. -- Scotch thistle (Bot.), a species of thistle (Onopordon acanth…

Of the nature of scrub; small and mean; stunted in growth; as, a scrubby cur. "Dense, scrubby woods." Duke of Argull.

A green seaweed (Cladophora rupestris) growing in dense tufts.

Any plant of the genus Carex, perennial, endogenous herbs, often growing in dense tufts in marshy places. They have triangular jointless stems, a spiked inflorescence, and long grasslike leaves which are usually rough on the margins and midrib. There are several hundred species.

Crowded; compact; dense; pressed together. Nor seemed it to relax their serried files. Milton.

e when a valve in the tube is opened; -- called also gazogene, and siphoid. -- Siphon condenser, a condenser for a steam engine, in which the vacuum is maintained by the downward flow of water through a vertical pipe of great height. -- Siphon cup, a cup with a siphon attached for carrying off any liquid in it; speci…

A building where meat or fish is cured by subjecting it to a dense smoke.

Snift. Snifting valve, a small valve opening into the atmosphere from the cylinder or condenser of a steam engine, to allow the escape of air when the piston makes a stroke; -- so called from the noise made by its action.

unlight through the tube, which sometimes is fixed in a window shutter; secondly, of a condenser, or large lens, for converging the beam upon the object; and, thirdly, of a small lens, or magnifier, for throwing an enlarged image of the object at its focus upon a screen in a dark room or in a darkened box. -- Solar mo…