Hermes Trismegistus(redirected from Mercurius ter Maximus)
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Hermes Tris·me·gis·tus(trĭs′mə-jĭs′təs, trĭz′-)
Hermes as identified with the Egyptian god Thoth, the legendary author of works on alchemy, astrology, and magic.
(Classical Myth & Legend) a Greek name for the Egyptian god Thoth, credited with various works on mysticism and magic
[Greek: Hermes thrice-greatest]
Her′mes Tris•me•gis′tus(ˌtrɪz məˈdʒɪs təs, ˌtrɪs-)
a name attributed by Neoplatonists and others to an Egyptian priest or to the Egyptian god Thoth, to some extent identified with the Greek god Hermes: various mystical, astrological, and alchemical writings were ascribed to him.
[< Medieval Latin < Greek Hermês Trismégistos Hermes thrice greatest]