平行公設 Save Sign in to save words Simplified: 平行公设 píngxínggōngshè ㄆㄧㄥˊ ㄒㄧㄥˊ ㄍㄨㄥ ㄕㄜˋ the parallel postulate (Euclid's fifth postulate) geometry Character by character 平(píng)surname Ping 行(xíng)go 公(gōng)public 設(shè)set up A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0