次声波 cìshēngbō infrasound wave Origin Definitions Defs Strokes Stroke Words Sentences Sents 次 cì hypo- (bound form) prefix used in chemistry to denote a lower oxidation state声波 聲波 shēngbō sound wave a mechanical wave that travels through a medium like air or water, caused by the vibration of an object; also called 音波 yīnbō