noun 1. a door, usually one of a communicating pair, that slides into and out of a recess in a doorway wall.
- Pocketed calculus
pocketed calculus n. See encysted calculus.
- Pocket drive
noun 1. (computing) a small portable memory device that can be plugged into the USB port of many different types of computer
noun 1. (def 3). 2. Informal. a small or smaller form of something; miniature version.