Noticeably fake bills or coins intended for use as toy currency, especially with board games, rather than currency in a legitimate exchange market.

(mathematics) the locus of points in the Euclidean plane that satisfies some geometric or algebraic definition; a curve in a plane (as opposed to higher-dimensional space)

(mathematics) Two-dimensional Euclidean space.

A beam built of steel plates and shapes welded or bolted together to form a deep beam larger than could be produced by a rolling mill.

An assembly of meshed gears consisting of a central (sun) gear, a coaxial internal gear-wheel and one or more intermediate pinions supported on a revolving carrier.

An unrefereed contest in which participants try to dominate each other without inflicting injury.

To engage in such a contest; to horseplay.

(baseball) A shift in the defensive alignment of the infielders towards home plate when there is a baserunner on first base, to increase the possibility of getting a double play.

(physics) A predicted state of matter, containing deconfined quarks and gluons, present in the very early universe (first millionth of a second), and recreated at extremely high energy densities, such as those in the collision of heavy atomic nuclei as speeds very close to the speed of light.

(beekeeping) Any plant from which bees usually collect nectar, pollen, or both for making honey.