博物学 bówùxué natural history Origin Definitions Defs Strokes Stroke Words Sentences Sents 博物 bówù noun natural science (bound form) an old term for the natural sciences, including biology, botany, and geology; often appears in compound words like 博物馆 bówùguǎn学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science