天算 tiānsuàn astronomy and mathematics Definitions Defs Origin Strokes Stroke Words Sentences Sents tiānsuàn astronomy and mathematics 天 tiān adjectivenoun nature nature; the natural world as opposed to human influence算 suàn noun to calculate to calculate; to compute; to figure out or count numberstiānsuàn fate 天 tiān nounproper noun God God; Heaven; the supreme ruler of the universe in traditional belief算 suàn verb to plan to plan; to calculate; to schemetiānsuàn natural lifespan 天 tiān adjectivenoun nature nature; the natural world as opposed to human influence算 suàn lifespan one's allotted life span; age