A Mathematical and Philosphical Dictionary
, aslant, indirect, or deviating from the perpendicular. As,
Oblique Angle, one that is not a right angle, but is either greater or less than this, being either obtuse or acute.
Oblique-angled Triangle, that whose angles are all oblique.
Oblique Ascension, is that point of the equinoctial which rises with the centre of the sun, or star, or any other point of the heavens, in an Oblique sphere.
Oblique Circle, in the stereographic projection, is any circle that is Oblique to the plane of projection.
Oblique Descension, that point of the equinoctial which sets with the eentre of the sun, or star, or other point of the heavens in an Obliqne sphere.
Oblique Direction, that which is not perpendicular to a line or plane.
Oblique Force, or Percussion, or Power, or Stroke, is that made in a direction Oblique to a body or plane. It is demonstrated that the effect of such Oblique force <*>c, upon the body, is to an equal perpendicular one, as the sine of the angle of incidence is to radius.
Oblique Line, that which makes an Oblique angle with some other line.
Oblique Planes, in Dialling, are such as recline from the zenith, or incline towards the horizon.
Oblique Projection, is that where a body is projected or impelled in a line of direction that makes an oblique angle with the horizontal line.
Oblique Sailing, in Navigation, is that part which includes the application and calculation of Obliqueangled triangles.
Oblique Sphere, in Geography, is that in which the axis is Oblique to the horizon of a place.—In this sphere, the equator and parallels of declination cut the horizon obliquely. And it is this obliquity that occasions the inequality of days and nights, and the variation of the seasons. See Sphere.