二项式定理 èrxiàngshìdìnglǐ binomial theorem Origin Definitions Defs Strokes Stroke Words Sentences Sents 二项式 二項式 èrxiàngshì binomial (math) binomial; an algebraic expression consisting of two terms定理 dìnglǐ theorem (mathematics or logic) a statement or formula that has been proven to be true based on established principles