Breadcrumb Home > Dictionary > Index E Ewing's sarcoma: Meaning and Definition of Find definitions for: Ew'ing's sarco'ma Pronunciation: [key] — Pathol. Pathol. a malignant stem-cell bone tumor, usually occurring in the leg or pelvis of children and young adults, characterized by pain, fever, and swelling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ewing ex ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language