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Sinus Sabaeus

American  
[see-nuhs sa-bee-uhs, sahy-] / ˈsi nəs sæˈbi əs, ˈsaɪ- /

noun

  1. an area in the southern hemisphere and near the equator of Mars, appearing dark when viewed telescopically from the earth.

Example Sentences

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Dark streaks, known as Sinus Sabaeus, indicate the presence of sand grains created from ancient lava flows.

From Time

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.