laccolith

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US/ˈlækəlɪθ/

noun

A mass of igneous or volcanic rock found within strata which forces the overlaying strata upwards and forms domes.

OriginAncient Greek λάκκος →
Scrabble 16
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Meanings

nounlaccolith (plural laccoliths)

plural laccoliths · alternative lacolith

  1. geographyA mass of igneous or volcanic rock found within strata which forces the overlaying strata upwards and forms domes.
  2. A mass similar to lopolith but concave up.

Origin

  1. Ancient Greekλάκκος“cistern”
  2. Englishlaccolith

From Ancient Greek λάκκος (lákkos, “cistern”) + -lith.

More words from Ancient Greek

Full word history & related roots →
Cite this entry
APA

laccolith. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/laccolith

MLA

“laccolith.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/laccolith. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “laccolith,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/laccolith.

Source: laccolith on Wiktionary, CC BY-SA 4.0.