instrument

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instrument

1. Music any of various contrivances or mechanisms that can be played to produce musical tones or sounds
2. a measuring device, such as a pressure gauge or ammeter
3. 
a. a device or system for use in navigation or control, esp of aircraft
b. (as modifier): instrument landing
4. a formal legal document
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Instrument

 

a tool of human labor or an actuating mechanism of a machine, which “takes hold of an object of labor and alters it in an expedient fashion” (K. Marx, in K. Marx and F. Engels, Soch., 2nd ed., vol. 23, p. 384).

Instruments are divided into the following categories: (1) cutting (cutter, drill, broach, milling cutter), (2) pressing (stamp, knurl), (3) polishing (polishing wheel, whetstone), (4) percussion (hammer, chisel, punch), and (5) fastening-clamping (machine tool chuck, cutter tool post, vise, tongs). Various devices, apparatus, and equipment used in science and technology for measurements and other procedures and in medicine and veterinary science for surgical operations, therapeutic procedures, and research are also called instruments.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

instrument

[′in·strə·mənt]
(engineering)
A device for measuring and sometimes also recording and controlling the value of a quantity under observation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

instrument

A device using an internal mechanism to show visually or aurally the attitude, altitude, or operation of an aircraft or an aircraft part. It includes electronic devices for automatically controlling an aircraft in flight.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

instrument

(programming)
To install devices or instructions into hardware or software to monitor the operation of a system or component.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
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Rotary and hand instruments may still be needed for removal of tissue or material other than infected dentine collagen.
Hand instruments of this type have typically been disposable, significantly increasing procedure costs.
Based in Missoula, Montana, USA, American Eagle is a leading global manufacturer of dental hand instruments and related supplies.
Over the past 40 years, Brasseler USA has developed a reputation as an innovative market leader in diamonds, carbides, polishers, endodontics, hand instruments, and handpieces.
MICRO-MEGAA, a hundred-year-old French company, possesses savoir- faire that is recognized worldwide in the fields of the design, manufacture and sale of dental surgical instruments (root canal instruments, obturation, hand instruments and instrument hygiene).
A: Olympus plays a major role in the sinus surgery market offering a complete range of products, including HD imaging systems, wide angled sinuscopes, precision hand instruments, and nasal packing.
The SPIDER MicroLap instruments used in the procedure include a variety of hand instruments designed to be placed through tiny 2.9 mm tubes, allowing surgeons the ability to perform their current minimally invasive procedures in an even less invasive manner.
Adherence to its original description is suggested and two major aspects addressed: the use of hand instruments only and of adhesive materials and systems.