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nergy with which a force operates or a cause acts; effectiveness, as estimated by results produced.

Between the ribs; pertaining to, or produced by, the parts between the ribs; as, intercostal respiration, in which the chest is alternately enlarged and contracted by the intercostal muscles.

hows a series of concentric colored rings with a single black cross; -- so called because produced by the interference of luminous waves. -- Interference fringe. (Optics) See Fringe.

o fever and ague. See Fever. -- Intermittent gearing (Mach.), gearing which receives, or produces, intermittent motion. -- Intermittent springs, springs which flow at intervals, not apparently dependent upon rain or drought. They probably owe their intermittent action to their being connected with natural reservoirs…

(called an Internal- combustion engine) in which the heat or pressure energy necessary to produce motion is developed in the engine cylinder, as by the explosion of a gas, and not in a separate chamber, as in a steam- engine boiler. The gas used may be a fixed gas, or one derived from alcohol, ether, gasoline (petrol),…

To produce; to cause to exist; to induce. [Obs.] Whosoever introduces habits in children, deserves the care and attention of their governors. Locke.

To discover, as by study or inquiry; to find out; to devise; to contrive or produce for the first time; -- applied commonly to the discovery of some serviceable mode, instrument, or machine. Thus first Necessity invented stools. Cowper.

to any two operations, which, when both are performed in succession upon any quantity, reproduce that quantity; as, multiplication is the inverse operation to division. The symbol of an inverse operation is the symbol of the direct operation with -1 as an index. Thus sin-1 x means the arc whose sine is x. Inverse figu…

f sugar, consisting of a mixture of dextrose and levulose, found naturally in fruits, and produced artificially by the inversion of cane sugar (sucrose); also, less properly, the grape sugar or dextrose obtained from starch. See Inversion, Dextrose, Levulose, and Sugar.

Likely to incur or produce ill will, or to provoke envy; hateful; as, invidious distinctions. Agamemnon found it an invidious affair to give the preference to any one of the Grecian heroes. Broome. -- In*vid"i*ous*ly, adv. -- In*vid"i*ous*ness, n.

A morbid state produced by the use of iodine and its compounds, and characterized by palpitation, depression, and general emaciation, with a pustular eruption upon the skin.

Of or pertaining to Ireland or to its inhabitants; produced in Ireland. Irish elk. (Zoöl.) See under Elk. -- Irish moss. (a) (Bot.) Carrageen. (b) A preparation of the same made into a blanc mange. -- Irish poplin. See Poplin. -- Irish potato, the ordinary white potato, so called because it is a favorite article of…

y pure or soft to be capable of extension under the hammer; also, specif., a kind of iron produced by removing a portion of the carbon or other impurities from cast iron, rendering it less brittle, and to some extent malleable. -- Meteoric iron (Chem.), iron forming a large, and often the chief, ingredient of meteorit…

Any agent by which irritation is produced; as, a chemical irritant; a mechanical or electrical irritant.

To produce irritation in; to stimulate; to cause to contract. See Irritation, n., 2.

ess of an organ or part of the body; a state in which the application of ordinary stimuli produces pain or excessive or vitiated action.

Accompanied with, or produced by, increased action or irritation; as, an irritative fever. E. Darwin.

-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. [Written also, less properly, isatine.]

to, having, or denoting, equality of force. Isodynamic foods (Physiol.), those foods that produce a similar amount of heat. -- Isodynamic lines (Magnetism), lines on the earth's surface connecting places at which the magnetic intensity is the same.

A crystalline hydrocarbon derivative, metameric with orcin, but produced artificially; -- called also cresorcin.