phacolith

noun phac·o·lith

Definition of phacolith

plural

-s

  1. :  a lens-shaped mass of igneous rock intruded in folded sedimentary beds with which it is approximately concordant and having its greatest thickness along the axes of synclines or anticlines

phacolithic

adjective

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of phacolith

phac- + -lith


Seen and Heard

What made you want to look up phacolith? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to help become familiar with something

Get Word of the Day daily email!