ˈdäləˌrīt noun
( -s )
Etymology: French dolérite, from Greek doleros deceitful (from dolos deceit) + -ite; from its being easily mistaken for diorite — more at tale
1. : a coarse basalt
2. Britain : diabase 3
3. : a dark igneous rock whose constituents are not determinable megascopically
• dol·er·it·ic |dälə|rid.ik adjective