(informal, humorous) Incapable of being misused even by the most stupid or careless of users.

To render something idiot-proof.

(philosophy) The use of reason to decide how to act.

(mathematics) The limit of two (or more) objects, considered without regard to any arrows between them.

Pressure that is less than normal atmospheric pressure

A mechanical device that uses a pump to generate a high-pressure stream of water (up to 5000 PSI - residential/commercial and up to 70000 PSI for commercial/industrial uses) to clean surfaces.

plural of price tag

Rare form of quid pro quo.

milk tooth

(chemistry) A form of chromatography in which the liquid mobile phase is forced through a column of solid stationary phase under high pressure