Dictionary.com
Thesaurus.com

Mare Boreum

American  
[bawr-ee-uhm, bohr-] / ˈbɔr i əm, ˈboʊr- /

noun

  1. (Northern Sea ) an area near the north pole of Mars, appearing as a dark region when viewed telescopically from the earth.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "Mare Boreum" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com