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decidua a mucous membrane that lines the uterus and is cast off at childbirth or during menstruation.
deciduous of trees and shrubs, having leaves that drop off seasonally each year. (Cf. evergreen.) [3 definitions]
decigram a unit of weight equal to one tenth of a gram or 1.543 grains.
decile in statistics, any of the values that divide a frequency distribution into ten groups of equal frequency, or any one of these groups.
deciliter a unit of capacity equal to one tenth of a liter or 3.39 fluid ounces.
decillion the number represented by the Arabic numeral 1033. [2 definitions]
decimal pertaining to the number ten or to tenths. [5 definitions]
decimal classification a system of organizing books in libraries using numbers with decimals.
decimal fraction a fraction whose denominator is some power of ten, indicated by a decimal point before the numerator, such as .7, equaling seven tenths, or .015, equaling fifteen thousandths. (Cf. common fraction.)
decimal point a period placed before the numerator in a decimal fraction.
decimal system a numbering or measuring system based on the number ten. [2 definitions]
decimate to destroy a large part or number of. [2 definitions]
decimation the act of destroying a large part or number of something.
decimeter a unit of length equal to one tenth of a meter or 3.937 inches.
decipher to convert from a coded form to ordinary language; decode. [2 definitions]
decipherable combined form of decipher.
decision the act of deciding, or the judgement, choice, or resolution that one has come to after considering a matter. [2 definitions]
decisive having the power or character to make decisions or end disputes. [2 definitions]
decistere a unit of volume equal to one tenth of a stere or cubic meter or 3.532 cubic feet.
deck a horizontal platform or floor that extends from side to side of a ship and that may have other platforms above or below it. [6 definitions]
deck chair a lightweight folding chair, often with a full-length leg rest, often used on passenger ships.