Webster's Revised Unabridged Dictionary · 1913

Gorgon

Gorgon (gôr"gon) , noun

[Latin Gorgo, -onis, Greek Gorgw`, from gorgo`s terrible.]

1.
(Greek Mythology) One of three fabled sisters, Stheno, Euryale, and Medusa, with snaky hair and of terrific aspect, the sight of whom turned the beholder to stone. The name is particularly given to Medusa.
2.
Anything very ugly or horrid. — Milton
3.
(Zoology) The brindled gnu. See Gnu.

Gorgon , adjective

Like a Gorgon; very ugly or terrific; as, a Gorgon face. — Dryden