from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. 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
- adj. Of or dealing with a vulcanoid
from The Century Dictionary and Cyclopedia
- n. A name given by Shaler to those numerous ‘craters’ upon the moon which seem to have been produced by volcanic action, and resemble terrestrial craters except in being much larger.
From the hypothetical planet Vulcan, erroneously believed to exist within the orbit of Mercury (Wiktionary)