The Collaborative International Dictionary of English v.0.48:
Metastatic \Met`a*stat"ic\, a. Of, pertaining to, or caused by, metastasis; as, a metastatic abscess; the metastatic processes of growth; a metastatic tumor. [1913 Webster]WordNet (r) 3.0 (2006):
metastatic adj 1: relating to or affected by metastasis; "metastatic growth"