CIDE DICTIONARY
quadrigeminal, 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.
ROGET THESAURUS
quadrigeminal
Quadruplication
N
quadruplication, fourfold, four times, quadrable, quadrumanous, quadruple, quadruplicate, quadrible, fourth, quadrifoliate, quadrifoliolate,
quadrigeminal, quadrigeminate, quadriplanar, quadriserial, four times, in the fourth place, fourthly.