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English definition of “deca-”

deca-

prefix uk   /ˈdek.ə-/ us  
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- from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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