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decagon a figure with ten sides and ten angles.
decal a design or picture on specially prepared paper. Decals can be transferred from the paper to glass, metal, or other hard surfaces.
decanter a pretty glass bottle with a stopper. A decanter is usually used to serve wine or liquor.
decathlon an athletic contest made up of ten different track and field events. Each athlete takes part in all ten events, over a period of two days.
decay to rot or become rotted. [4 definitions]
deceased no longer alive; dead. [2 definitions]
deceit the act of lying or cheating. [2 definitions]
deceive to cause to believe something that is not true; trick or fool.
December the twelfth month of the year. December has thirty-one days. Winter begins in December for people who live north of the equator.
decent proper or suitable. [3 definitions]
deception the act of causing someone to believe something that is not true.
decibel a unit used to measure the loudness of sound. (abbreviated: dB)
decide to settle, choose, or solve. [3 definitions]
deciduous having leaves that drop off each year.
decimal based on the number ten. [3 definitions]
decimal point a period placed between the units and the tenths in decimal numbers. It is used when writing money amounts to separate dollars and cents.
decipher to change from a code into ordinary language. [2 definitions]
decision the act or result of making up one's mind.
decisive able to make firm decisions or end arguments. [2 definitions]
deck the floor on a ship or boat. Sometimes a ship has several decks at different levels. [4 definitions]
declaration the act of declaring or making something known.