Webster 1913 Edition
-entis, p. pr. of
tangereto touch; akin to Gr. [GREEK] having seized: cf. F.
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
Artificial tangent, or
the logarithm of the natural tangent of an arc.–
a decimal expressing the length of the tangent of an arc, the radius being reckoned unity.–
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.
-entis, p. pr.]
Touching; touching at a single point; specifically
meeting a curve or surface at a point and having at that point the same direction as the curve or surface; – said of a straight line, curve, or surface;
as, a line
tangentto a curve; a curve
tangentto a surface;
a plane which touches a surface in a point or line.–
a kind of breech sight for a cannon.–
an endless screw; a worm.
Webster 1828 Edition
In geometry, a right line which touches a curve, but which when produced, does not cut it. In trigonometry, the tangent of an arc, is a right line touching the arc at one extremity, and terminated by a second passing through the other extremity.