sar·co·ma 
(sär-kōmə)
(sär-kōmə)n. pl. sar·co·mas also sar·co·ma·ta (-mə-tə)
A malignant tumor arising from bone or from soft tissues such as muscle, cartilage, fat, or blood or lymph vessels.
[New Latin, from Greek sarkōma, sarkōmat-, fleshy excrescence, from sarkoun, to produce flesh, from sarx, sark-, flesh.]
sar·coma·toid′ (-mə-toid′), sar·coma·tous (-təs) adj.