D0327900 (dŏl′ə-rīt′)n.Chiefly British A dark, fine-grained igneous rock; diabase.[French dolérite, from Greek doleros, deceitful (from its easily being mistaken for diorite), from dolos, trick; see del- in Indo-European roots.]dol′er·it′ic(ə-rĭt′ĭk) adj.EncyclopediaSeeDolerite