heptadWiktionary 原文英美/ˈhɛptæd/构词拆解hepthepta-前缀ad-ad后缀hepta-Seven.-adA unit or set (especially of a specified number).词源说明From hepta- + -ad.释义名词noun1Synonym of septet: a group of seven things.2(genetics) A sequence of seven bases.同族词派生词 2diheptad