/ Dictionary / Index R rhabdomyosarcoma: Meaning and Definition of Find definitions for: rhab•do•my•o•sar•co•ma Pronunciation: (rab"dō-mī"ō-sär-kō'mu), [key] — pl. -mas, -ma•ta a malignant tumor made up of striated muscle tissue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rhabdomyosarcoma (Thesaurus) rhabdomyoma rhabdovirus Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language