the removal of calculus and other deposits on the teeth by means of instruments.
Zoology. one of the thin, flat, horny plates forming the covering of certain animals, as snakes, lizards, and pangolins. one of the hard, bony or dentinal plates, either flat or denticulate, forming the covering of certain other animals, as fishes.
any thin, platelike piece, lamina, or flake that peels off from a surface, as from the skin.
Botany. Also called bud scale. a rudimentary body, usually a specialized leaf and often covered with hair, wax, or resin, enclosing an immature leaf bud. a thin, scarious or membranous part of a plant, as a bract of a catkin.