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The act or operation of subtracting or taking away a part.

Pertaining to, or acting as, a succedaneum; supplying the place of something else; being, or employed as, a substitute for another. Sir T. Browne.

, -- formerly a famous nostrum. -- Sulphur base (Chem.), an alkaline sulphide capable of acting as a base in the formation of sulphur salts according to the old dual theory of salts. [Archaic] -- Sulphur dioxide (Chem.), a colorless gas, SO2, of a pungent, suffocating odor, produced by the burning of sulphur. It is em…

. Moxon. Swash plate (Mach.), a revolving circular plate, set obliquely on its shaft, and acting as a cam to give a reciprocating motion to a rod in a direction parallel to the shaft.

A sensitive kind of barometer, in which the pressure of the atmosphere, acting upon a liquid, as oil, in the lower portion of the instrument, compresses an elastic gas in the upper part.

mbined action is greater than expected as a simple additive combination of the two agents acting separately. Also synergism.

Of or pertaining to systole, or contraction; contracting; esp., ralating to the systole of the heart; as, systolic murmur. Dunglison.

Apt to take; alluring; attracting. Subtile in making his temptations most taking. Fuller.

A self-acting apparatus for regulating temperature by the unequal expansion of different metals, liquids, or gases by heat, as in opening or closing the damper of a stove, or the like, as the heat becomes greater or less than is desired.

Like a thief; acting by stealth; sly; secret. Time's thievish progress to eternity. Shak.

The property possessed by living protoplasm of contracting, and thus moving, when touched by a solid or fluid substance.

A sulphur hydrocarbon, C4H4S, analogous to furfuran and benzene, and acting as the base of a large number of substances which closely resemble the corresponding aromatic derivatives.

n of the sun and moon (the influence of the latter being three times that of the former), acting unequally on the waters in different parts of the earth, thus disturbing their equilibrium. A high tide upon one side of the earth is accompanied by a high tide upon the opposite side. Hence, when the sun and moon are in co…

A beam acting as a tie, as at the bottom of a pair of principal rafters, to prevent them from thrusting out the wall. See Illust. of Timbers, under Roof. Gwilt.

enemy, sometimes in the rear to check his pursuit. The term is now applied to all troops acting as skirmishers.

A projection from the periphery of a revolving piece, acting as a cam to lift another piece. Toe biter (Zoöl.), a tadpole; a polliwig. -- Toe drop (Med.), a morbid condition of the foot in which the toe is depressed and the heel elevated, as in talipes equinus. See Talipes.

cale for weighing in which the fulcra of the levers or beams are strained wires or strips acting by torsion.

Serving to draw; pulling; attracting; as, tractive power.

Three, considered collectively; three in company or acting together; a set of three; three united. The trio were well accustomed to act together, and were linked to each other by ties of mutual interest. Dickens.

In a single-acting engine, an elongated hollow piston, open at the end, in which the end of the connecting rod is pivoted. The piston rod, crosshead and stuffing box are thus dispensed with.