expectorantWiktionary 原文构词拆分expectorate词根/词干+-ant后缀(now sciences, chiefly medicine) The agent noun derived from verb. · An adjective corresponding to a noun in -ance, having the sense of "exhibiting (the condition or process described by the noun)".词源说明From expectorate + -ant.释义（英文）名词 Noun(medicine) An agent or drug used to cause or induce the expulsion of phlegm from the lungs.形容词 Adjective(medicine) Causing or assisting the expulsion of phlegm.词族相关词（2）