plural of doubleness

plural of Double

A surname.

(US, motor racing) Collectively, both the Indianapolis 500, a day race, and the Coca-Cola 600, an evening race, both of which are run on Memorial Day weekend Sunday. Used concerning racers who (wish[/ed/ing] to) participat[e/ed/ing] in both events, typically using a private jet to travel between Indianapolis, Indiana, after the 500 and Charlotte, North Carolina, to get to the 600.

(physics) A characteristic of the transition of a system or process from regular motion to chaos, in which the period of one of its parameters is seen to double.

present participle of double up

present participle of double down

plural of period doubling

present participle of double off

(backgammon) A cube used to record the number of points at stake in a game, bearing on its six sides the powers of two from 2 to 64.