Try Our Apps


The Best Internet Slang


[lak-uh-lith] /ˈlæk ə lɪθ/
noun, Geology.
a mass of igneous rock formed from magma that did not find its way to the surface but spread laterally into a lenticular body, forcing overlying strata to bulge upward.
Also, laccolite
[lak-uh-lahyt] /ˈlæk əˌlaɪt/ (Show IPA)
Origin of laccolith
1875-80; < Greek lákko(s) pond + -lith
Related forms
laccolithic, laccolitic
[lak-uh-lit-ik] /ˌlæk əˈlɪt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
British Dictionary definitions for laccolith


a dome-shaped body of igneous rock between two layers of older sedimentary rock: formed by the intrusion of magma, forcing the overlying strata into the shape of a dome See lopolith
Derived Forms
laccolithic, laccolitic (ˌlækəˈlɪtɪk) adjective
Word Origin
C19: from Greek lakkos cistern + -lith
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
laccolith in Science
A body of igneous rock intruded between layers of sedimentary rock, resulting in uplift. Laccoliths are usually plano-convex in cross-section, having a flat bottom and a convex top, and are roughly circular in plan. They are usually connected to a dike and are typically up to 8 km (5 mi) in diameter and tens to hundreds of meters thick. See illustration at batholith.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for laccolith

Few English speakers likely know this word

Word Value for laccolith

Scrabble Words With Friends

Nearby words for laccolith