| Platinic | a. (Chem.) Of, pertaining to, or containing, platinum; -- used specifically to designate those compounds in which the element has a higher valence, as contrasted with the platinous compounds; as, platinic chloride (PtCl4). [ 1913 Webster ] |
| Platinichloric | a. (Chem.) Of, pertaining to, or designating, an acid consisting of platinic chloride and hydrochloric acid, and obtained as a brownish red crystalline substance, called platinichloric, or chloroplatinic, acid. [ 1913 Webster ] |
| Platonical | { } a. [ L. Platonicus, Gr. &unr_;: cf. F. platonique. ] 1. Of or pertaining to Plato, or his philosophy, school, or opinions. [ 1913 Webster ] 2. Pure, passionless; nonsexual; philosophical. [ 1913 Webster ]
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. [ 1913 Webster ]
Variants: Platonic |
