开平方 kāipíngfāng to extract a square root Definitions Defs Origin Strokes Stroke Words Sentences Sents 开 開 kāi verbparticle to open to open; to unfold; to unseal; (of flowers) to bloom; to carve or cut open平方 píngfāng noun square The product of a number multiplied by itself; a square in mathematics; also called 二次幂 èrcìmì or 二次方 èrcìfāng