(chemistry) The study of ancient alchemy using the knowledge and techniques of modern chemistry in order to advance the understanding of the history of chemistry.

(philosophy) The use of reason to decide how to act.

(mathematics) Any positive integer having the property that all smaller integers can be represented as sums of distinct divisors of it

plural of practical joke

plural of practical number

plural of practical joker

someone who instigates practical jokes

plural of practical nurse

(film) A special effect produced physically, without computer-generated imagery or other postproduction techniques.

plural of practical effect