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ex·an·the·ma(ĕg′zăn-thē′mə) also ex·an·them (ĭg-zăn′thəm)
n. pl. ex·an·them·a·ta (-thĕm′ə-tə) or ex·an·the·mas also ex·an·thems
1. A skin eruption accompanying certain infectious diseases.
2. A disease, such as measles or scarlet fever, accompanied by a skin eruption.
[Late Latin exanthēma, from Greek, eruption, from exanthein, to burst forth : ex-, ex- + anthein, to blossom (from anthos, flower).]
ex·an′the·mat′ic (ĭg-zăn′thə-măt′ĭk), ex′an·them′a·tous (ĕg′zăn-thĕm′ə-təs) adj.