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safety call
(dating) A prescheduled phone call to another person who knows where one is and who one was going out with. A missed check-in (or using a pre-arranged code phrase for danger) signals one's contact person to call for help.
safety coffin
Any coffin specially designed for the occupant to leave it in case of premature burial, such as by warning other people to help him.
safety coffins
plural of safety coffin
e-safety
safety arch
(architecture) An arch built in the body of a wall to relieve the pressure, as over a door or window.
safety plug
A plug of soft metal in an opening in a steam boiler, designed to melt when the temperature rises to a certain point, and thus allow the escape of steam.
safety plugs
plural of safety plug
safety arches
plural of safety arch
safety stops
plural of safety stop