[ thahy-sis, tahy- ]
/ ˈθaɪ sɪs, ˈtaɪ- /

noun Pathology.

a wasting away.
pulmonary tuberculosis; consumption.


Origin of phthisis

1515–25; < Greek phthísis lung disease, literally, a wasting away, equivalent to phthí(ein) to decay + -sis -sis Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for phthisis

British Dictionary definitions for phthisis


/ (ˈθaɪsɪs, ˈfθaɪ-, ˈtaɪ-) /


any disease that causes wasting of the body, esp pulmonary tuberculosis

Word Origin for phthisis

C16: via Latin from Greek: a wasting away, from phthinein to waste away
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for phthisis


[ thīsĭs, tī- ]


A disease characterized by the wasting away or atrophy of the body or part of the body.
Tuberculosis of the lungs. No longer in technical use.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.