Microsauria

plural noun
Mi·​cro·​sau·​ria

Definition of Microsauria

1 : an order of extinct amphibians (suborder Lepospondyli) of the Pennsylvanian and Lower Permian that resemble salamanders, are sometimes considered ancestral to modern apodal and caudate amphibians, or are placed among the primitive reptiles
2 in some classifications : an order or other group of amphibians equivalent to Lepospondyli (see Lepospondyli sense a)

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.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Microsauria

New Latin, from micr- + -sauria

Keep scrolling for more

Learn More about Microsauria

Statistics for Microsauria

Cite this Entry

“Microsauria.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Microsauria. Accessed 7 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Comments on Microsauria

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

WORD OF THE DAY

Test Your Vocabulary

Who Knew?

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!