Laccolite \Lac"co*lite\, Laccolith \Lac"co*lith\, n. [Gr. ? a
cistern + -lite, -lith.] (Geol.)
A mass of igneous rock intruded between sedimentary beds and
resulting in a mammiform bulging of the overlying strata. --
{Lac`co*lit"ic}, a.
[1913 Webster]