n. (Med.), Any of several malignant neoplasms (usually of the skin) consisting of melanocytes; called also melanoma. It is classed as a type of skin cancer. [ WordNet 1.5 ]
‖n.; L. pl. -nomata /plu>. [ NL.; Gr. &unr_;, &unr_;, black + -oma. ] (Med.) (a) A tumor containing dark pigment. Such tumors are usually malignant and often fatal. (b) Development of dark-pigmented tumors. [ Webster 1913 Suppl. +PJC ]