[foh-buh s, -bos]
- Also Pho·bus [foh-buh s] /ˈfoʊ bəs/. Classical Mythology. 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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the larger of the two satellites of Mars and the closer to the planet. Approximate diameter (although it has an irregular shape): 23 kmCompare Deimos
- The larger and inner of the two planetary satellites of Mars.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.