from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A double, eclipsing variable star in the constellation Perseus, almost as bright as Polaris.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. An eclipsing binary star in the constellation of Perseus; Beta (β) Persei. It represents the eye of Medusa, whose head is being held by Perseus.
from the GNU version of the Collaborative International Dictionary of English
- n. A fixed star, in Medusa's head, in the constellation Perseus, remarkable for its periodic variation in brightness.
Arabic al-ġūl : al-, the + ġūl, ghoul; see ġwl in Semitic roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Arabic الغول (al-ghūl, "the ghoul"). (Wiktionary)