calculus

noun

the branch of mathematics that is concerned with limits and with the differentiation and integration of functions
極限値、および関数の微分と積分に関する数学の分野
a hard lump produced by the concretion of mineral salts
鉱物塩が凝結してできた固い塊

found in hollow organs or ducts of the body
体の中空器官や管に見られる
- renal calculi can be very painful
  腎臓結石は非常に痛い場合がる
an incrustation that forms on the teeth and gums
歯や歯茎につく付着物