Atomic clock

src: www.sciencesource.com An atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultra...

Verge escapement

src: i.ytimg.com The verge (or crown wheel ) escapement is the earliest known type of mechanical escapement, the mechanism in a mechanical...

Alarm clock

src: www.pointsincase.com An alarm clock (or sometimes just an alarm ) is a clock that is designed to alert an individual or group of indiv...

Ceramic resonator

src: i.ytimg.com A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more ...

Taxicab

src: www.nyc.gov A taxicab , also known as a taxi or a cab , is a type of vehicle for hire with a driver, used by a single passenger or sma...