melanoma

mel·a·no·ma   (měl'ə-nō'mə)    n.   pl. mel·a·no·mas or mel·a·no·ma·ta (-mə-tə) A dark-pigmented, usually malignant tumor arising from a melanocyte and occurring most commonly in the skin.

melanoma [(mel-uh-noh-muh)]

A serious, often lethal, form of skin cancer.

Note: Exposure to ultraviolet radiation from the sun (for example, by too much sunbathing) can cause this disease.

melanoma 

Main Entry: mel·a·no·ma
Pronunciation: "mel-&-'nO-m&
Function: noun
Inflected Form: plural mel·a·no·mas also mel·a·no·ma·ta /-m&t-&/
1 : a benign or malignant skin tumor containingdark pigment
2 : a tumor of high malignancy that starts in melanocytes of normal skin or moles and metastasizes rapidly and widely called also malignant melanoma,melanocarcinoma, melanoepithelioma, melanosarcoma

melanoma mel·a·no·ma (měl'ə-nō'mə)
n. pl. mel·a·no·mas or mel·a·no·ma·ta (-mə-tə)
A dark-pigmented, malignant, frequently widely metastasizing tumor arising from a melanocyte and occurring most commonly in the skin. Also called malignant melanoma, melanoblastoma, melanocarcinoma, melanotic carcinoma.