Try Our Apps
Dictionary.com

follow Dictionary.com

The Word of the Year is...

Sinus Iridum

[see-nuh s ir-i-duh m, sahy-] /ˈsi nəs ˈɪr ɪ dəm, ˈsaɪ-/
noun
1.
(Bay of Rainbows) a semicircular dark plain in the second quadrant of the face of the moon.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
Cite This Source
Examples from the Web for Sinus Iridum
Historical Examples
  • The “moon maiden” is a term applied to a fancied resemblance of a portion of the Sinus Iridum to a female head.

    Astronomical Curiosities J. Ellard Gore

Word of the Day

Difficulty index for Sinus Iridum

Few English speakers likely know this word

Word Value for Sinus

5
7
Scrabble Words With Friends

Nearby words for sinus iridum