[ dahy-mos ]
/ ˈdaɪ mɒs /


an ancient Greek personification of terror, a son of Ares and Aphrodite.
Astronomy. one of the two moons of Mars. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for deimos

British Dictionary definitions for deimos

/ (ˈdeɪmɒs) /


the smaller of the two satellites of Mars and the more distant from the planet. Approximate diameter: 13 kmCompare Phobos
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

Scientific definitions for deimos

[ dēmōs, dā- ]

The satellite of Mars that is second in distance from the planet.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.