Anything that has a particular use; such as, a tool, an object, or a plan, all of which are used to accomplish an objective or some purpose: Mark used his computer as a device for compiling his e-book.

The rescuers were using a special device to find people who were trapped in the collapsed building.

Lina's cool manner is her device to avoid having to talk to her colleagues at work.

Any of a wide variety of computer components that accept or produce sound: The audio device Jenny had on her computer was important for her to receive some very nice radio music!

Instruments that consist of a magnet, generally rare earth (either samarium cobalt or neodymium iron boron), and an energizing coil.

The magnet is attached to the ossicular chain (any of certain small bones, as those of the middle ear), tympanic membrane, or the inner ear (round window or fenestra).

A fluctuating magnetic field is generated when the coil is energized by a signal, which corresponds to an acoustic input and this magnetic field causes the magnet to vibrate.

The vibrating magnet, in turn, causes movement of either the ossicular chain or the cochlear fluids directly.

The force generated is inversely proportional to the square of the distance between the coil and magnet (e.g., doubling the distance between the magnet and coil results in an output of one-fourth the force); therefore, these two components must be maintained in close proximity to one another to realize an efficient system.

Electronically driven equipment which will constantly monitor the physiological status of patients and the effects of those medical interventions on the patients.

Such mechanisms should relieve hospital staff of time-consuming "human monitoring" procedures and in some cases they will enable patients to carry monitoring devices during their daily living activities.

Such instruments would make regular assessments of blood-sugar concentration in patients with diabetes mellitus (metabolic disorder affecting blood sugar levels) or process the routine checking of the blood or tissue concentrations of administered drugs.

A short rhyme, phrase, or other mental technique for making information easier to memorize: The mnemonic device that Bernhard's children used for learning the alphabet was to sing the song of the ABCs!

In electronics, a tool in which a voltage moves electrical charges through a circuit: The peristaltic charge-coupled device is a high-speed charge-transfer circuit which functions in much the same way as the contractions and dilations, or expansions, that take place in the body's digestive tract which moves food through the stomach.