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English definition of “deca-”

deca-

prefix     /ˈdek.ə-/
ten; used in forming nouns : decathlon (= a sports competition with 10 events ) decahedron (= a shape with 10 faces ) specialized (also deka-) science ten times the stated unit : a decapascal a decametre
(Definition of deca- prefix from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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