Relier Pairs Deci-/Deca-Version en ligne Greek Prefix par Nohelani Day 1 decathlon 2 decimal 3 decagon 4 decapod 5 decibel 6 decimeter 7 decimate 8 decade a unit of measure for sound meaning "one tenth of a bel" a number system based on the number 10 with tenth parts and powers of 10 a crustacean with 10 legs, such as shrimp, crab, or lobster a polygon with ten straight sides and angles a metric unit of length, equal to one tenth of a meter a period of ten years an athletic event in which each competitor takes part in ten events to destroy or reduce a population (of something) by one tenth