A state of Mexico.

(inorganic chemistry) The calcium salt of phosphoric acid, Ca₃(PO₄)₂, or of several related acids; it is the main mineral of bone

Alternative spelling of calcium sulfate

(inorganic chemistry) The calcium salt of sulfuric acid, CaSO₄, the hydrates of which are known as gypsum or plaster of Paris, and the anhydrous mineral form being anhydrite.

A rhythm method of natural birth control.

(logic) A formal system.

(logic) propositional logic.

(mathematics, computing) An electronic calculator that can handle trigonometric, exponential and often other advanced functions, and can show its output in scientific notation and sometimes in hexadecimal, octal or binary.

toyon (Photinia arbutifolia, syn. Heteromeles arbutifolia)

Synonym of felicific calculus