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Webster’s Dictionary (1828)



60 words match “URVA”

URVA n.
The crab-eating ichneumon (Herpestes urva), native of India. The fur is black, annulated with white at the tip of each hair, and a white streak extends from the mouth to the shoulder.
CURVAL; CURVANT a.
Bowed; bent; curved.
CURVATE; CURVATED a.
Bent in a regular form; curved.
CURVATION n.
The act of bending or crooking.
CURVATIVE a.
Having the margins only a little curved; -- said of leaves. Henslow.
CURVATURE n. 2 definitions
of a line or surface from a rectilinear direction; a bend; a curve. Cowper. The elegant curvature of their fronds. Darwin.
INCURVATE a. 2 definitions
Curved; bent; crooked. Derham.
INCURVATION n. 3 definitions
The state of being bent or curved; curvature. An incurvation of the rays. Derham.
RECURVATE a. 2 definitions
Recurved.
RECURVATION n.
The act of recurving, or the state of being recurved; a bending or flexure backward.
TRICURVATE a.
Curved in three directions; as, a tricurvate spicule (see Illust. of Spicule).
ABERRANCE; ABERRANCY n.
rant; a wandering from the right way; deviation from truth, rectitude, etc. Aberrancy of curvature (Geom.), the deviation of a curve from a circular form.
ABSOLUTE a.
ce in government; as, the case absolute. See Ablative absolute, under Ablative. Absolute curvature (Geom.), that curvature of a curve of double curvature, which is measured in the osculating plane of the curve. -- Absolute equation (Astron.), the sum of the optic and eccentric equations. -- Absolute space (Physics),…
ACHROMATIC a.
es having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed. -- Achromatic prism. See Prism. -- Achromatic telescope, or microscope, one in…
ADUNCITY n.
Curvature inwards; hookedness. The aduncity of the beaks of hawks. Pope.
ANTICLASTIC a.
Having to opposite curvatures, that is, curved longitudinally in one direction and transversely in the opposite direction, as the surface of a saddle.
APLANATIC a.
Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens. Aplanatic focus of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage…
APOPHYGE n.
The small hollow curvature given to the top or bottom of the shaft of a column where it expands to meet the edge of the fillet; -- called also the scape. Parker.
ARC n.
A curvature in the shape of a circular arc or an arch; as, the colored arc (the rainbow); the arc of Hadley's quadrant.
ARCH n.
Any curvature in the form of an arch; as, the arch of the aorta. "Colors of the showery arch." Milton. Triumphal arch, a monumental structure resembling an arched gateway, with one or more passages, erected to commemorate a triumph.
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