radian

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radian
When the length of an arc of a circle is equal to the radius of the circle, the angle subtended by that arc equals one radian.

ra·di·an

 (rā′dē-ən)
n. Abbr. rad
A unit of angular measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57°17′44.6".

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

radian

(ˈreɪdɪən)
n
(Units) an SI unit of plane angle; the angle between two radii of a circle that cut off on the circumference an arc equal in length to the radius. 1 radian is equivalent to 57.296 degrees and π/2 radians equals a right angle. Symbol: rad
[C19: from radius]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ra•di•an

(ˈreɪ di ən)

n.
the measure of a central angle subtending an arc equal in length to the radius: equal to 57.2958°. Abbr.: rad
[1875–80]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

ra·di·an

(rā′dē-ən)
A unit of angular measure equal to a little more than 57°. This is the measure of an angle whose vertex is the center of a circle and whose two rays intersect the circle so as to form an arc with the same length as the circle's radius.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.radian - the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
angular unit - a unit of measurement for angles
milliradian - a unit of angular distance equal to one thousandth of a radian
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
радиан
radiaani
radian
radiano
radián
radian

radian

[ˈreɪdɪən] nradiante m
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
Mrad Utility Services is a private company used by Electricite du Liban to provide customer liaison, meter installation and readings and bill collection in the country's south.
Barrett's MRAD, developed by company president Chris Barrett, is the answer to USSOCOM's search for a modular, multi-caliber, bolt-action sniper rifle capable of converting between 7.62x51mm, .300 Norma Magnum and .338 Norma Magnum cartridges.
In ideal tracking condition, the focal axis of the dish concentrator is parallel to the center line S (S = [0,0, - 1.0]) in the sun cone (sun half-apex angle [delta] = 4.65 mrad).
Mrad was born in Lebanon and says he has "always been interested in architecture".
Speaking to Middle East Consultant, Mrad said "you can't ignore the sustainable issue", and highlighted that of the development's 5,000,000sqft, approximately 40% is set aside as green space.
ADJUSTMENT CLICKS 0.1 mrad or 0.25 MOA ELEVATION 89 MOA ADJUSTMENT RANGE WINDAGE 60 MOA ADJUSTMENT RANGE LENGTH 12.6 in.
All meniscal allografts were divided into three groups (20 in each group) and then sterilized with 0 Mrad, 1.5 Mrad, or 2.5 Mrad of gamma irradiation.
This provides 2-kW of power and a beam quality of 2 mm x mrad, a doubling of the previous-generation laser.
Par ailleurs, l'adolescent de 16 ans, Achref Ben Mrad, blesse lors de l'attentat, a ete transporte a l'hopital militaire de Tunis avec les deux soldats Abdelkarim Rabhi et Mehdi Ben Said.
"The Army Force's search operation aims to unveil the whereabouts of a number of abducted Syrian nationals, especially that of Ksara Makhoul Mrad, who is still held in the captivity of kidnappers," the agency added.
The solution will help us with information gathering of all the data necessary to identify US entities, generating alerts and workflow between the Compliance Officer and Relationship Manager, maintaining an audit trail, and providing the necessary reporting to authorities," said Georges Mrad, Head of IT Department, Creditbank.