"large, shallow dish for holding eatables," late 13c., platere, from Anglo-French plater, Old French plate "metal plate" (see plate (n.)). Especially a large plate on which meat is placed to be carved.
Entries linking to platter
mid-13c., "flat sheet of gold or silver," also "flat, round coin," from Old French plate "thin piece of metal" (late 12c.), from Medieval Latin plata "plate, piece of metal," perhaps via Vulgar Latin *plattus, formed on model of Greek platys "flat, broad" (from PIE root *plat- "to spread"). The cognate in Spanish (plata) and Portuguese (prata) has become the usual word for "silver," superseding argento via a shortening of *plata d'argento "plate of silver, coin."
From 14c. as "armor made of sheets of metal." Meaning "table utensils" (originally of silver or gold only) is from Middle English. Meaning "shallow dish on which food is served at table," now usually of china or earthenware, originally of metal or wood, is from mid-15c. Meaning "articles which have been covered with a plating of precious metal" is from 1540s.
In photography, "common rectangular piece of glass used to receive the picture," by 1840. The baseball sense "home base" is from 1857. Geological sense "nearly rigid part of the earth's lithosphere" is attested from 1904; plate tectonics is attested from 1967. Plate-glass for a superior kind of thick glass used for mirrors, shop-windows, etc., is recorded from 1729.
also *pletə-, Proto-Indo-European root meaning "to spread;" extension of root *pele- (2) "flat; to spread."
It forms all or part of: clan; flan; flat (adj.) "without curvature or projection;" flat (n.) "a story of a house;" flatter (v.); flounder (n.) "flatfish;" implant; piazza; place; plaice; plane; (n.4) type of tree; plant; plantain (n.2); plantar; plantation; plantigrade; plat; plate; plateau; platen; platform; platinum; platitude; Platonic; Plattdeutsch; platter; platypus; plaza; supplant; transplant.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit prathati "spreads out;" Hittite palhi "broad;" Greek platys "broad, flat;" Latin planta "sole of the foot;" Lithuanian platus "broad;" German Fladen "flat cake;" Old Norse flatr "flat;" Old English flet "floor, dwelling;" Old Irish lethan "broad."