/saɪˈdoʊniə/ (sy-DOH-nee-uh)

Definitions

1. noun

A region of Mars, specifically the low-lying plain near the equator, also known as the ‘face on Mars’, due to its resemblance to a human face.

“The scientists studied the geological features of Cydonia, a region on Mars that sparked public fascination with its mysterious ‘face’.”