deimos
Definition
Proper noun 1. The outer and smaller of the two natural satellites of the planet Mars: Deimos is one of the two moons orbiting Mars, discovered in 1877. It is irregularly shaped and has a very smooth surface due to a covering of regolith.
Usage
- Deimos is always capitalized as it is a proper noun, the name of a specific celestial body.
- It is typically used in astronomical and scientific contexts.
- It is often mentioned alongside Phobos, the other Martian moon.
Examples
- The two moons of Mars are named Phobos and Deimos.
- Deimos orbits Mars at a greater distance than Phobos.
- Scientists are studying images of Deimos sent by space probes.
Advanced Usage
- Comparative Description: Due to its small size and distant orbit, Deimos appears more like a bright star than a moon from the surface of Mars.
- Mythological Origin: The name Deimos comes from Greek mythology, where Deimos was the personification of dread and terror, a son of Ares (the Greek counterpart of the Roman god Mars).
Variants and Related Words
- Phobos (proper noun): The inner and larger of the two moons of Mars.
- Martian (adjective): Relating to the planet Mars (e.g., ).
- Satellite (noun): A natural or artificial body that orbits a planet.
Synonyms
- Moon of Mars: This is a descriptive synonym, though it is not specific to Deimos alone.
- Martian satellite: A more technical descriptive term.
Different Meanings
- Deimos has no other common meanings in modern English outside of its astronomical reference. In ancient Greek, "deimos" (δεῖμος) meant "dread" or "terror," which is the etymological root for the moon's name.
Noun
-
the outer of two small satellites of Mars
