noun Geology.
a minor hiatus in an orderly succession of sedimentary rocks.
Compare unconformity.

1850–55; < Greek diástēma interval; see diastema

diastemic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To diastem
Explore Dictionary.com
Previous Definition: diastatic
Next Definition: diastema
Words Near: diastem
More from Thesaurus.com
Synonyms and Antonyms for diastem
More from Reference.com
Search for articles containing diastem
More from Dictionary.com Translator
Relevant Questions
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Example sentences
Occasionally a disconformity or diastem is indicated within the marlstone.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature