(engineering) A volatile, flammable liquid which is used to aid the starting of internal combustion engines, especially during cold weather.

plural of perse

The process of checking out of a hotel, or the latest time to vacate a room in one. / The process of checking out items at a supermarket or library. / The place in a supermarket where this is done.

(zoology) Relating to, or resembling, the butterflies of the family Pieridae.