noun, feminine/plak/plural: plaques
sheet, plate (of metal); slab (of marble); plaque (bacteria on teeth); plaque, slab (ornamental); chip
“plaque muqueuse, dentaire”
Synonyms: jeton, brique, bâton
From Middle Dutch placken (“to patch, beat metal into a thin plate”), from placke (“disk, patch, stain”), from *Old Dutch plagga (“patch”), from Proto-Germanic *plaggą (“patch”).