— doleritic /dol'euh rit"ik/ , adj.
/dol"euh ruyt'/ , n. Petrol.
1. a coarse-grained variety of basalt.
2. any of various other igneous rocks, as diabase.
3. any basaltlike igneous rock whose composition can be determined only by microscopic examination.
[ 1830-40; dolérite doler ( ós ) deceitful (deriv. of dólos wile) + F -ite -ITE 1 ]