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Children's Dictionary
abacus a device used for counting or calculating. An abacus has beads or other counters that slide along rods or in grooves.
accelerator a mechanical device that controls the speed of something, especially the gas pedal of a car.
altimeter a device that measures distance above the Earth's surface.
amplifier an electronic device used to make sound louder.
answering machine a device connected to a telephone that records an incoming message from a caller when the telephone is not answered.
antenna a metal device that sends or receives radio or television signals. [1/2 definitions]
appliance a device used for a particular purpose. Stoves, refrigerators, toasters, vacuum cleaners, and room heaters are some appliances used in the home. Most applicances use electricity.
Aqua-Lung trademark for an underwater breathing device.
audio a particular sound recording, often giving instructions, information, or a sample of a longer recording, made to be heard on a computer or other electronic device. [1/4 definitions]
battery a device that makes electricity by using chemical reactions. Batteries are used to power many things, including cars, flashlights, toys, and watches. [1/3 definitions]
beep a short, high sound that serves as a signal. A beep is made by an electronic device or a car horn. [1/3 definitions]
binder a large, sturdy notebook cover that contains a device for holding loose papers.
binocular (usually plural) a device that uses lenses and mirrors to make objects look larger. Binoculars are used with both eyes at once.
bionic an electronic or mechanical device that replaces or helps something natural. An artificial leg is one kind of bionic device.
blowtorch a small device that makes a very hot, small flame for melting or cutting metal.
brake1 a device used to slow or stop the motion of a vehicle or machine. [1/2 definitions]
broom a device for sweeping. A broom has a bundle of straw or a brush attached to the end of a long handle.
buckle to join or fasten with a device, usually made of metal, that links two ends of something. [1/6 definitions]
bulb a device made of rounded glass used to create electric light. [1/3 definitions]
buzzer an electrical device that signals by buzzing.
camcorder a portable video recording device that includes a camera and a videocassette recorder in one unit.