[noun] 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" Synonyms:concretion
[noun] an incrustation that forms on the teeth and gums Synonyms:tartar, tophus
[noun] the branch of mathematics that is concerned with limits and with the differentiation and integration of functions Synonyms:the infinitesimal
