retinoblastoma

noun, plural ret·ino·blas·to·mas, ret·ino·blas·to·ma·ta [ret-noh-bla-stoh-muh-tuh] /ˌrɛt noʊ blæˈstoʊ mə tə/.

1. Pathology. an inheritable tumor of the eye.

n. pl. ret•i•no•blas•to•mas

1. A hereditary malignant tumor of the retina, transmitted as a dominant trait and occurring chiefly among infants.