metastasis

me·tas·ta·sis

noun \mə-ˈtas-tə-səs\

plural me·tas·ta·ses \-ˌsēz\

Definition of METASTASIS

1

a : change of position, state, or form b : the spread of a disease-producing agency (as cancer cells or bacteria) from the initial or primary site of disease to another part of the body <metastases of breast cancer to bone—Medical Physics>; also : the process by which such spreading occurs

2

: a secondary malignant tumor resulting from metastasis