deca-
prefix uk/dek.ə-/ us/dek.ə-/
十（用以组成名词）
ten; used in forming nouns
decathlon (= a sports competition with 10 events) （田径）十项全能运动
decahedron (= a shape with 10 faces) 十面体
science specialized (also deka-)十倍于某单位
ten times the stated unit
a decapascal 十帕斯卡
a decametre 十米