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Platonic \Pla*ton"ic\, Platonical \Pla*ton"ic*al\, a. [L.
Platonicus, Gr. ?: cf. F. platonique.]
1. Of or pertaining to Plato, or his philosophy, school, or
opinions.

2. Pure, passionless; nonsexual; philosophical.

{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 persons of opposite sex, 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} (Astron.), 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; -- called also {great year}.
This revolution, which is caused by the precession of the
equinoxes, is accomplished in about 26,000 years.
--Barlow.