天文学大成 Save Sign in to save words Traditional (Taiwan): 天文學大成 tiānwénxuédàchéng ㄊㄧㄢ ㄨㄣˊ ㄒㄩㄝˊ ㄉㄚˋ ㄔㄥˊ the Almagest by Ptolemy Character by character 天(tiān)day 文(wén)surname Wen 学(xué)learn 大(dà)big 成(chéng)surname Cheng A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0