Quadrigeminal \Quad`ri*gem"i*nal\, Quadrigeminous
\Quad`ri*gem"i*nous\, a. [Quadri- + L. gemini twins.]
Fourfold; having four similar parts, or two pairs of similar
parts.
[1913 Webster]
{Quadrigeminal bodies} (Anat.), 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.
[1913 Webster]