Platonic

[Lat. Platonicus, Gr. Πλατωνικός, Fr. Platonique, It. & Sp. Platonico.] Pertaining to Plato the philosopher, or to his philosophy, his school, or his opinions.

Platonic bodies, the five regular geometrical solids; namely, the tetrahedron, hexahedron or cube, octahedron, dodecahedron, and icosahedron.—Platonic love, a pure, spiritual affection subsisting between the sexes, unmixed with carnal desires, and regarding the mind only and its excellences;—a species of love for which Plato was a warm advocate.—Platonic year, the great year, or a period of time determined by the revolution of the equinoxes, or the space of time in which the stars and constellations return to their former places in respect to the equinoxes. This revolution, which is calculated by the precession of the equinoxes, is accomplished in about 26,000 years. Barlow.