Tangent

Definition of Tangent

Tan´gent
n.1.(Geom.) A tangent line curve, or surface; specifically, that portion of the straight line tangent to a curve that is between the point of tangency and a given line, the given line being, for example, the axis of abscissas, or a radius of a circle produced. See Trigonometrical function, under Function.
Artificial tangent
the logarithm of the natural tangent of an arc.
Natural tangent
a decimal expressing the length of the tangent of an arc, the radius being reckoned unity.
Tangent galvanometer
(Elec.) a form of galvanometer having a circular coil and a short needle, in which the tangent of the angle of deflection of the needle is proportional to the strength of the current.
Tangent of an angle
the natural tangent of the arc subtending or measuring the angle.
Tangent of an arc
a right line, as ta, touching the arc of a circle at one extremity a, and terminated by a line ct, passing from the center through the other extremity o.
a.1.(Geom.) Touching; touching at a single point
Tangent plane
(Geom.) a plane which touches a surface in a point or line.
Tangent scale
(Gun.) a kind of breech sight for a cannon.
Tangent screw
(Mach.) an endless screw; a worm.

Related Words

abutter, adjoiner, air line, approach, asymptote, axis, beeline, borderer, bottleneck, bystander, chord, collision course, concentralization, concentration, concourse, concurrence, confluence, conflux, congress, convergence, converging, crossing, diagonal, diameter, direct line, directrix, edge, focalization, focus, funnel, great-circle course, hub, immediate neighbor, looker-on, meeting, mutual approach, narrowing gap, neighbor, neighborer, normal, onlooker, perpendicular, radius, radius vector, right line, secant, segment, shortcut, side, spokes, straight, straight course, straight line, straight stretch, straightaway, streamline, transversal, vector
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