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| Equal decrement of life | Decrement \Dec"re*ment\, n. [L. decrementum, fr. decrescere. See {Decrease}.] 1. The state of becoming gradually less; decrease; diminution; waste; loss. [1913 Webster] Twit me with the decrements of my pendants. --Ford. [1913 Webster] Rocks, mountains, and the other elevations of the earth suffer a continual decrement. --Woodward. [1913 Webster] 2. The quantity lost by gradual diminution or waste; -- opposed to {increment}. [1913 Webster] 3. (Crystallog.) A name given by Ha["u]y to the successive diminution of the layers of molecules, applied to the faces of the primitive form, by which he supposed the secondary forms to be produced. [1913 Webster] 4. (Math.) The quantity by which a variable is diminished. [1913 Webster] {Equal decrement of life}. (a) The decrease of life in a group of persons in which the assumed law of mortality is such that of a given large number of persons, all being now of the same age, an equal number shall die each consecutive year. (b) The decrease of life in a group of persons in which the assumed law of mortality is such that the ratio of those dying in a year to those living through the year is constant, being independent of the age of the persons. [1913 Webster] |
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