Analog: Analog is the traditional style of time keeping in which the hours and minutes are represented by an hour and minute hand with a round clock dial displaying the hours.
Arabic Dial: Most familiar numeral (1, 2, 3, 4, etc...) used on a dial as distinguished from Roman numerals (I, II, III, IV)
Ascending Alarm: Alarm that increases volume.
Atomic Clock: An atomic clock is a precision clock that uses radio frequencies to synchronize itself with the official U.S. radio controlled clock operated by the National Institute of Standards and Technology located in Fort Collins, Colorado. Atomic clocks are often more technical than basic radio controlled clocks.
Beveled Glass: Glass used on the sides and front of a clock case, which has its outside edges ground and polished at an angle providing a beautiful decorative effect.
Bezel: The grooved rim around the dial into which the crystal is set.
Chime-Selector: A step-up feature on many case clocks which allows the chime tune or melody to be changed.
Crystal: A glass or plastic piece that covers the dial for both protection and decoration.
Dial: The face of the clock. A decorative plate on which the hours are indicated.
Digital: Digital clocks display the time with a series of digital numbers rather than the traditional hour and minute hands use on analog clocks.
Hands: Pointed metal or plastic indicators, usually decorative, which mark the hours, minutes and seconds on the clock dial.
Key-Wound Movement: A key winds the mechanical main spring which powers the clock. Key-wound movements generally run the clock for up to eight days before needing manual rewinding.
Liquid Crystal Display (LCD): Time is displayed continuously in digits. Electrical current is applied to a layer of liquid crystals between two layers of transparent material. The crystals form the digits.
Light Emitting Diode (LED): Numbers telling the hour and minutes light up. Electrical current transmits coded signals that translate into numbers.
Movement: The inner mechanism of a clock; may be key-wound, weight-driven, battery-powered, electric or quartz.
Pendulum: Swinging rod and weight (bob) suspended below the clock movement. Pendulum determines the rate at which the movement measures time.
Quartz Movement: Electronic impulses pass from a battery through a quartz crystal powering the movement of the clock at regular intervals.
Radio Controlled Clock: Radio controlled clocks are basically the same thing as atomic clocks, however not always as technical. They are precision clocks that uses radio frequencies to synchronize themselves with the official U.S. radio controlled clock operated by the National Institute of Standards and Technology located in Fort Collins, Colorado.
