Sputum

имя существительное 1) слюна Синоним(ы): saliva, spittle 2) [медицина] мокрота Например: to produce the sputum — выделять мокроту

Большой англо-русский словарь

Sputum

noun (plural sputa) Etymology: Latin, from neuter of sputus, past participle of spuere to spit — more at spew expectorated matter especially from the air passages in diseases of the lungs, bronchi, or upper respiratory tract

Merriam-Webster's Collegiate Dictionary