lei·o·my·o·ma 
(lī′ō-mī-ōmə)
(lī′ō-mī-ōmə)n. pl. lei·o·my·o·mas or lei·o·my·o·ma·ta (-mə-tə)
A benign tumor derived from smooth muscle, occurring most often in the uterus.
[Greek leios, smooth; see (s)lei- in the Appendix of Indo-European roots + MYOMA.]
lei′o·my·oma·tous (-ōmə-təs, -ŏmə-) adj.