He-mŏp'ty-sis, n.

n. [Gr. αἷμα, blood, and πτύσις, a spitting, from πτύειν, to spit; Fr. hémoptysie.] (Med.) Hemorrhage from the mucous membrane of the lungs, characterized by the expectoration of more or less florid and frothy blood. [Written also hemoptoë.] Dunglison.