Inclination is the angle between a reference plane and the orbital plane.
Inclination may also refer to:
Science Slope, tilt, steepness, or angle from horizontal of a line (in mathematics and geometry) Axial tilt, also known as equatorial inclination Grade (slope), the tilt of a topographic feature (hillside, etc.) or constructed element (road, etc.) Depression angle, part of a spherical coordinate system
Literature Inclination (ethics), an examination of desire in the context of moral worthiness "Inclination" (novella), a science fiction novella by William Shunn