Webster’s Revised Unabridged Dictionary · 1913
Expectorant
Ex·pec′to·rant (ĕks·pĕk′tō·rant), a. [L. expectorans, p. pr. of expectorare to drive from the breast: cf. F. expectorant.] (Med.) Tending to facilitate expectoration or to promote discharges of mucus, etc., from the lungs or throat. — n. An expectorant medicine.