teratoma noun. [tɛrǝ'tǝʊmǝ] Pl. -mas, -mata [-mǝtǝ]. L19.
[from TERATO- + -OMA.]
Medicine. A tumour, esp. of the gonads, formed of cells of distinct heterogeneous tissues foreign to the site of the tumour and arising from an embryological abnormality.

■ teratomatous adjective of the nature of a teratoma L19.

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