An instrument whose calibration can be determined by means of physical measurements on the instrument.

plural of absolute superlative

plural of absolute zero

plural of absolute monarchy

plural of decree absolute

(set theory) The set that contains exactly those elements belonging to the universal set but not to a given set.

(mathematics) The mean of the absolute magnitude of a function that has both positive and negative values.

(astronomy) The intrinsic luminosity that a celestial body would have if viewed from a distance of 10 parsecs or about 32.6 light years.

(mathematics) For a complex number a+bi, the principal square root of the sum of the squares of its real and imaginary parts, √. Denoted by | |.

(law) the official decree marking the legal end of a marriage, allowing the two people to remarry; it follows the decree nisi after six weeks (in Britain)