Webster's Revised Unabridged Dictionary · 1913

Quadrigeminal

Quadrigeminal , adjective

[Quadri- + Latin gemini twins.]

Fourfold; having four similar parts, or two pairs of similar parts.
Collocations (1)
Quadrigeminal bodies (Anatomy) , two pairs of lobes, or elevations, on the dorsal side of the midbrain of most mammals; the optic lobes. The anterior pair are called the nates, and the posterior the testes.

Also: Quadrigeminous