/ Dictionary / Index T thalassemia: Meaning and Definition of Find definitions for: thal•as•se•mi•a Pronunciation: (thal"u-sē'mē-u), [key] — n. Pathol. a hereditary form of anemia, occurring chiefly in people of Mediterranean origin, marked by the abnormal synthesis of hemoglobin and a consequent shortened life span of red blood cells. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thalassemia (Thesaurus) Thalassa thalassic Related Content Daily Word Quiz: longevity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language