| 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. |
| alarm |
a bell, buzzer, or siren that warns of some danger, or the device that produces such a warning. [1/4 definitions] |
| 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] |
| app |
An app is a computer application designed for use on a mobile device such as a cell phone. |
| 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. |
| bird feeder |
an outdoor device used for feeding wild birds. A bird feeder is typically filled with seeds and grain and hung from a tree branch or post. |
| 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] |