vulcanoid
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English
Etymology
From Vulcan + -oid, from the hypothetical planet Vulcan, erroneously believed to exist within the orbit of Mercury.
Pronunciation
Noun
vulcanoid (plural vulcanoids)
- (astronomy) A member of the hypothetical population of small asteroids orbiting in the dynamically stable zone between 0.08 and 0.21 AU from the Sun
Adjective
vulcanoid (not comparable)
- (astronomy) Of or pertaining to a vulcanoid.