QUADRIGEMINAL
Adjective
quadrigeminal (not comparable)
Having four parts, or two pairs.
Synonym: quadrigeminate
Source: Wiktionary
Quad`ri*gem"i*nal, Quad`ri*gem"i*nous, a. Etym: [Quadri- + L. gemini
twins.]
Definition: Fourfold; having four similar parts, or two pairs of similar
parts. 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.
Source: Webster’s Unabridged Dictionary 1913 Edition