<tumour> A leiomyoma that contains cystlike foci of proteinaceous fluid; hydromyoma's occur more frequently in leiomyomas of the uterus, as a result of degenerative changes. ... Origin: hydro-+ G. Mys, muscle, + -oma, tumour ... (05 Mar 2000) ... 
(hi″dro-mi-o´mә) a leiomyoma with cystic degeneration.