US standard spelling of plate armour.

plural of plate ship

plural of plate money

(banking, historical) A type of money issued in Sweden in the 17th and 18th centuries consisting of large rectangular pieces of copper.

simple past tense and past participle of plate out

(chemistry) That which has plated out; dissolved metal deposited onto a solid surface.

(intransitive, chemistry, of an aqueous ion) To be neutralized and deposited onto a solid surface. / (transitive, chemistry) To cause to plate out.

(physics) a sheet of birefringent material whose thickness is such that the light associated with the larger refractive index is retarded in phase by 90° with respect of that associated with the smaller refractive index; used to convert linearly polarized light into circularly polarized light

(chiefly US, idiomatic) To initiate action; to assume or take a responsibility.

(physics) An optical device that uses diffraction through alternate transparent and opaque rings to function as a lens