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".

[radi(us) + -an.]

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)

(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]

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:

Noun

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)

rad

angular unit - a unit of measurement for angles

milliradian - a unit of angular distance equal to one thousandth of a radian

Translations

радиан

ακτίνιο

radiaani

radian

radian

radiano

радиан

radián

radian

radian

[ˈreɪdɪən] n → radiante m

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

Mentioned in

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.

South Lebanon residents get power hotline

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.

Barrett Awarded USSOCOM Contract

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).

Effect of Tracking Error of Double-Axis Tracking Device on the Optical Performance of Solar Dish Concentrator

Mrad was born in Lebanon and says he has "always been interested in architecture".

The mastermind: Elie Mrad, head of architecture at ARADA

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.

Sharjah's Nasma Residences developed with sustainability in mind

ADJUSTMENT CLICKS 0.1 mrad or 0.25 MOA ELEVATION 89 MOA ADJUSTMENT RANGE WINDAGE 60 MOA ADJUSTMENT RANGE LENGTH 12.6 in.

Nightforce: ATACR 4-16X 42mm

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.

Macroscopic and Histological Evaluations of Meniscal Allograft Transplantation Using Gamma Irradiated Meniscus: A Comparative in Vivo Animal Study

This provides 2-kW of power and a beam quality of 2 mm x mrad, a doubling of the previous-generation laser.

Laser cutting hot-stamped steel: TRUMPF has increased the performance of its TruLaser Cell 8030 for handling 3D cutting of advanced high-strength steels

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.

Attentat de Jebel Ouergha: La date des funerailles sera fixee en concertation avec les familles des martyrs

"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.

Lebanese Army Begins Sweeping Operation in Arsal's Outskirts in Search for Militants

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.

Lebanon's Creditbank introduces Capital Compliance FATCA Module