secant
[ seekant, kuh nt ]
/ ˈsi kænt, kənt /

noun
Geometry. an intersecting line, especially one intersecting a curve at two or more points.
Trigonometry.
 (in a right triangle) the ratio of the hypotenuse to the side adjacent to a given angle.
 (originally) a line from the center of a circle through one extremity of an arc to the tangent from the other extremity.
 the ratio of the length of this line to that of the radius of the circle; the reciprocal of the cosine of a given angle or arc. Abbreviation: sec
adjective
cutting or intersecting, as one line or surface in relation to another.
Origin of secant
Related formsse·cant·ly, adverb
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for secant
British Dictionary definitions for secant
secant
/ (ˈsiːkənt) /
noun
(of an angle) a trigonometric function that in a rightangled triangle is the ratio of the length of the hypotenuse to that of the adjacent side; the reciprocal of cosineAbbreviation: sec
a line that intersects a curve
Derived Formssecantly, adverb
Word Origin for secant
C16: from Latin secāre to cut
Collins English Dictionary  Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for secant
secant
1590s, from Latin secantem (nominative secans) "a cutting," present participle of secare "to cut" (see section (n.)). First used by Danish mathematician Thomas Fincke in "Geometria Rotundi" (1583).
Online Etymology Dictionary, © 2010 Douglas Harper
Science definitions for secant
secant
[ sē′kănt′ ]
A straight line or ray that intersects a curve, especially a circle, at two or more points.
The ratio of the length of the hypotenuse in a right triangle to the side adjacent to an acute angle. The secant is the inverse of the cosine.
The reciprocal of the abscissa of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length x and measured counterclockwise from the point (1, 0) if x is positive or clockwise if x is negative.
A function of a number x, equal to the secant of an angle whose measure in radians is equal to x.
The American Heritage® Science Dictionary
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