/ Dictionary / Index C cretinism: Meaning and Definition of Find definitions for: cre•tin•ism Pronunciation: (krēt'n-iz"um or, esp. Brit., kret'-), [key] — n. Pathol. a congenital disease due to absence or deficiency of normal thyroid secretion, characterized by physical deformity, dwarfism, and mental retardation, and often by goiter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cretinism (Thesaurus) cretin cretinize Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language