HYPERBOLOID
Hy*per"bo*loid, a. (Geom.)

Defn: Having some property that belongs to an hyperboloid or hyperbola.

HYPERBOREAN
Hy`per*bo"re*an, a. Etym: [L. hyperboreus, Gr. Boreas.]

1. (Greek Myth.)

Defn: Of or pertaining to the region beyond the North wind, or to its inhabitants.

2. Northern; belonging to, or inhabiting, a region in very far north; most northern; hence, very cold; fright, as, a hyperborean coast or atmosphere. The hyperborean or frozen sea. C. Butler (1633).

HYPERBOREAN
Hy`per*bo"re*an, n.

1. (Greek Myth.)

Defn: One of the people who lived beyond the North wind, in a land of perpetual sunshine.

2. An inhabitant of the most northern regions.