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To make hard or harder; to make firm or compact; to indurate; as, to harden clay or iron.

Made hard, or compact; made unfeeling or callous; made obstinate or obdurate; confirmed in error or vice.

cause or procure to be; to effect; to exact; to desire; to require. It had the church accurately described to me. Sir W. Scott. Wouldst thou have me turn traitor also Ld. Lytton.

. Heptagonal numbers (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.

Any one of a series of unsaturated metameric hydrocarbons, C7H12, of the acetylene series.

Having six hydrogen atoms or six radicals capable of being replaced or saturated by bases; -- said of acids; as, mellitic acid is hexabasic.

nomena of history and the laws controlling them. And historionomers will have measured accurately the sidereal years of races. Lowell.

al surfaces; that is, so that the relative actual areas of the different countries are accurately represented by the corresponding portions of the map.

A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.

To saturate; to imbue. [Obs.] "Earth, imbibed with . . . acid." Sir I. Newton.

Not according to facts; inaccurate; erroneous. Improper diphthong. See under Diphthong. -- Improper feud, an originalfeud, not earned by military service. Mozley & W. -- Improper fraction. See under Fraction.

That which is improper; an unsuitable or improper act, or an inaccurate use of language. But every language has likewise its improprieties and absurdities. Johnson. Many gross improprieties, however authorized by practice, ought to be discarded. Swift.

Not accurate; not idiomatic; as, impure Latin; an impure style.

The quality of being inaccurate; want of accuracy or exactness.

To inaugurate. [Obs.] Latimer.

The day on which the President of the United States is inaugurated, the 4th of March in every year next after a year divisible by four.

One who inaugurates.

Not correct; not according to a copy or model, or to established rules; inaccurate; faulty. The piece, you think, is incorrect. Pope.

Not correctly; inaccurately; not exactly; as, a writing incorrectly copied; testimony incorrectly stated.

Not ripened or suppurated; -- said of an abscess or its contents.