Phobos

American

[foh-buhs, -bos] / ˈfoʊ bəs, -bɒs /

noun

Classical Mythology. Also Phobus a son and attendant of Ares and the personification of a fear held to possess armies and cause their defeat.
Astronomy. one of the two moons of Mars.

Phobos British

/ ˈfəʊbɒs /

noun

the larger of the two satellites of Mars and the closer to the planet. Approximate diameter (although it has an irregular shape): 23 km Compare Deimos

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Phobos Scientific

/ fō′bəs /

The larger and inner of the two planetary satellites of Mars.

Example Sentences

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Phobos

Researchers believe micrometeorites striking Mars' moons, Phobos and Deimos, may throw dust particles into space.

From Science Daily ● May 11, 2026

Scientists aren’t sure whether Phobos and Deimos are former asteroids that Mars captured into orbit with its gravity or if they formed out of debris that was already in orbit around Mars.

From Salon ● Dec. 29, 2023

While Earth’s Moon has many visitors – big and small, robotic and crewed – planned for 2024, Mars’ moons Phobos and Deimos will soon be getting a visitor as well.

From Salon ● Dec. 29, 2023

Following the Phobos failure, space officials talked about conducting a thorough revision of the lunar spacecraft design to avoid using similar substandard components.

From Seattle Times ● Aug. 22, 2023

Schiaparelli is almost due east, and if my sextant and Phobos calculations are correct, I've got another 1030 kilometers to get there.

From "The Martian" by Andy Weir

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