noun, plural teratomas, teratomata [ter-uh-toh-muh-tuh] . Pathology.
a tumor made up of different types of tissue.

1885–90; terat- + -oma

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World English Dictionary
teratoma (ˌtɛrəˈtəʊmə)
n , pl -mata, -mas
a tumour or group of tumours composed of tissue foreign to the site of growth

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Medical Dictionary

teratoma ter·a·to·ma (těr'ə-tō'mə)
n. pl. ter·a·to·mas or ter·a·to·ma·ta (-mə-tə)
A tumor consisting of different types of tissue, as of skin, hair, and muscle, caused by the development of independent germ cells. Also called teratoblastoma, teratoid tumor.

ter'a·to'ma·tous (-tō'mə-təs) adj.
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