Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. 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°17ʹ44.6〞. See Table at measurement.
Century Dictionary and Cyclopedia
- n. The angle subtended at the center of a circle by an are equal in length to the radius. Also called the unit angle in circular measure. It is equal to 57° 17′ 44″. 80625 nearly.
- n. A unit of angular velocity equivalent, approximately, to 0.15916 revolutions per second, or, strictly, to revolutions per second: in full, radian per second.
Wiktionary
- n. geometry In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad
GNU Webster's 1913
- n. (Math.) An arc of a circle which is equal to the radius, or the angle measured by such an arc.
WordNet 3.0
- n. 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)
Etymologies
- From radi(us) + -an (Wiktionary)
- radi(us) + -an1. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Light en - ergy gathered by the sheaths was relayed by lines called radian draws.”
“A radian is a measurement used to describe angles.”
“A radian is the equivalent of (a) 2 angular degrees (b) 1/(2) of the angle comprising a full circle (c) the circumference of a unit circle (d) 1 = 4 of the angle comprising a full circle”
“When to use "radian" mode in casio scientific calculator fx-85ms.? what is difference between methematics and logic or arthematics? true/false For any two subsets A, B in a vector space [A intersection B] = [A] intersection”
“One radian of phase, symbolized rad (although you can write out the whole word '' radian ''), is equal to about”
“Your symplectic one, though, if it has made an error of one A.U. in its position, will put it one radian ahead or behind in its orbit, but still in its correct orbit.”
“You'd have to have a pretty accurate launcher radian to assure the launch elevation was precisely the same as last time.”
“As a result, the radian/degree error was quickly diagnosed and known long before any potential use of these results for policy purposes.”
“Re #19C: I had nothing to do with the radian/degree thing, although they all pretend that.”
“Spanner Frew yelled something down to one of the Rovers amidships, and the crewman waved back, moving to tighten a radian draw.”
Lists
These user-created lists contain the word ‘radian’.
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Interesting words
A list of words that are odd or words that I have looked up.
concupiscence, brize, scree, scoria, forestaff, spanaemia, valetudinarianism, distasture, pyrethrum, laudanum, gentian, bicameral and 11184 more...
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lasers
words associated with LASERS.
( open list, randomness )
NOTE: i'd like to keep the list specific to the LASER itself (Any LASER), and leave out applied sciences..
sp...electromagnetism, light, wavelength, phase, frequency, polarization, emission, optical, spectroscopy, lase, crystal, projection and 61 more...
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oldecat's Words
noncommutative, morphodynamics, ferrywoman, circumcircle, acceleration, inactivity, biodiesel, corrosion, quadrilogy, imprimitivity, normalizer, teleosemantics and 240 more...
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Filed in the "Junk" drawer
Miscellaneous junk I want to deal with mentally at some other time.
drake equation, game theory, prisoner's dilemma, tit for tat, fermi paradox, curry's paradox, logic, mathematics, newton's rings, radian, steradian, dimensionless qua... and 6 more...
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mathematical delights
zero, cartesian, ellipse, binomial, parabola, algebraic, quadrilateral, circumference, pi, modulus, indices, matrices and 39 more...
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measure my words
inch, chain, furlong, bushel, metre, litre, cubic metre, newton, farad, coulomb, faraday, pint and 40 more...
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measure up
avoirdupois, réaumur, fathom, league, furlong, decare, hectare, cubit, drachm, bushel, shekel, quintal and 16 more...
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Nifty Math Words
A list of nifty or "cool" math words
parabola, isosceles, matrix, oblique, reciprocal, algorithm, asymptote, ellipsis, hypercube, infinitesimul, isometry, jerk and 8 more...
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2012-12-01
Tweets
Looking for tweets for radian.
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