The commonest variation of contract bridge in club and tournament play, in which the same deal of cards is played at each table and scoring is based on relative performance.

A form of the board game Scrabble where an announcer draws a set of letters and announces them to the players in the room who all draw the same seven letters, and all players play from the same board position with the same letters.

(mathematics) The operation of finding a cube having a volume which is double that of a given cube.

diphallia

plural of spirit duplicator

plural of duplication of the cube

A mimeograph (machine).

plural of stencil duplicator

(historical, printing) An early document copier using alcohol-based solvents.

(genetics) A form of polyploidy in which an organism has duplicate copies of its entire genome