1. A morbid concretion of a hard or stony consistence formed in different organs of the body; a method of calculating. Differential calculus, the method of differencing quantities, or of finding an infinitely small quantity, which, being taken an infinite number of times, shall be equal to a given quantity. The exponential calculus, a method of finding and summing up the differentials of exponential quantities. Integral calculus, a method of integrating or summing up differential quantities. Literal calculus, algebra.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• calcule,
• calculas,
• calcuim,
• calcuta,
• calcuum,
• calcum,
• calcl,
• calculis,
• calcules,
• calcul,
• calcus,
• calculet,
• calculat,
• calculs,
• calculte,
• calculus,
• calculu,
• calcular,
• calyclle,
• calicule

• calculate,
• calcutta,
• calmly,
• cackle,
• caulk.

The adjective form of the word "Calculi" is "calculous".