Phthisis

thī′sis, n. consumption or wasting away of the lungs.— adjs. Phthis′ic , -al (tiz′ik, -al), pertaining to or having phthisis.— n. Pht his i ology (tiz-i-ol′ō-ji), the sum of scientific knowledge about phthisis. [L.,—Gr. phthiein , to waste away.]