柯林斯詞典deca- (also deka- or dec- or dek-) 1. PREFIX denoting ten: decagon. In conjunction with scientific units the symbol da is used 表示“十” 返回 deca-劍橋詞典ten; used in forming nouns 十（用以組成名詞） decathlon (= a sports competition with 10 events ) （田徑）十項全能運動 decahedron (= a shape with 10 faces ) 十面體 science specialized (also deka-) ten times the stated unit 十倍于某單位 a decapascal 十帕斯卡 a decametre 十米 返回 deca-