1. A jiffy (sense 1). 2. In simulations, the discrete unit

of time that passes between iterations of the simulation

mechanism. In AI applications, this amount of time is often

left unspecified, since the only constraint of interest is the

ordering of events. This sort of AI simulation is often

pejoratively referred to as "tick-tick-tick" simulation,

especially when the issue of simultaneity of events with long,

independent chains of causes is handwaved. 3. In the FORTH

language, a single quote character.