WordReference Random House Unabridged Dictionary of American English © 2026
phthis•ic
(tiz′ik, thiz′-),USA pronunciation [Pathol.]
n.
adj.
n.
- Pathologya wasting disease of the lungs;
phthisis. - Pathologyasthma.
- Pathologya person who suffers from phthisis.
adj.
- Pathologypertaining to phthisis;
phthisical.
- Medieval Latin (p)tisicus; Latin, as above
- Greek phthisikós (see phthisis, -ic); replacing Middle English tisike
- Latin phthisicus
- 1300–50
'phthisic' also found in these entries (note: many are not synonyms or translations):