柯林斯詞典dyad /?da??d/ 1. N an operator that is the unspecified product of two vectors. It can operate on a vector to produce either a scalar or vector product 并向量[maths] 返回 dyad劍橋詞典formal something that consists of two parts 二元體，二分體 social science specialized a group of two people , which is the smallest possible social group （社會關系）二人組合（如夫妻） the marital dyad 夫妻二人 mother-infant dyads 母子二人 返回 dyad