|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
blastoma blas·to·ma (blā-stō'mə)
n. pl. blas·to·mas or blas·to·ma·ta (-mə-tə)
A neoplasm composed of immature, undifferentiated cells. Also called blastocytoma, embryonal carcinosarcoma.