Doler*it"ic

from The Collaborative International Dictionary of English v.0.48

Dolerite \Dol"er*ite\, n. [Gr. dolero`s deceptive, because it
   was easily confounded with diorite.] (Petrography)
   (a) A dark, crystalline, igneous rock, chiefly pyroxene with
       labradorite.
   (b) Coarse-grained basalt.
   (c) Diabase.
   (d) Any dark, igneous rock composed chiefly of silicates of
       iron and magnesium with some feldspar. -- {Dol`er*it"ic},
       a.
       [Webster 1913 Suppl.]

from The Collaborative International Dictionary of English v.0.48

Doleritic \Dol`er*it"ic\, a.
   Of the nature of dolerite; as, much lava is doleritic lava.
   --Dana.
   [1913 Webster]