a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body; renal calculi can be very painful

[ Syn: concretion ]

an incrustation that forms on the teeth and gums

[ Syn: tartar , tophus ]

the branch of mathematics that is concerned with limits and with the differentiation and integration of functions

[ Syn: infinitesimal calculus ]