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Webster 1913 Edition


Curvature

Cur′va-ture

(k?r′v?-t?r; 135)
,
Noun.
[L.
curvatura
. See
Curvate
.]
1.
The act of curving, or the state of being bent or curved; a curving or bending, normal or abnormal, as of a line or surface from a rectilinear direction; a bend; a curve.
Cowper.
The elegant
curvature
of their fronds.
Darwin.
2.
(Math.)
The amount of degree of bending of a mathematical curve, or the tendency at any point to depart from a tangent drawn to the curve at that point.
Aberrancy of curvature
(Geom.)
,
the deviation of a curve from a circular form.
–
Absolute curvature
.
See under
Absolute
.
–
Angle of curvature
(Geom.)
,
one that expresses the amount of curvature of a curve.
–
Chord of curvature
.
See under
Chord
.
–
Circle of curvature
.
See
Osculating circle of a curve
, under
Circle
.
–
Curvature of the spine
(Med.)
,
an abnormal curving of the spine, especially in a lateral direction.
–
Radius of curvature
,
the radius of the circle of curvature, or osculatory circle, at any point of a curve.

Webster 1828 Edition


Curvature

CURVATURE

,
Noun.
[L. See Curve.] A bending in a regular form; crookedness, or the manner of bending; flexure by which a curve is formed.