Emily Dickinson Lexicon

HE-LI-O-CENT'RIC, a. [Fr. heliocentrique; Gr. ἡλιος, the sun, and κεντρον, center.]

The heliocentric place of a planet, is the place of the ecliptic in which the planet would appear to a spectator at the center of the sun. The heliocentric latitude of a planet, is the inclination of a line drawn between the center of the sun and the center of a planet to the plane of the ecliptic. Encyc. Helioid parabola, in mathematics, the parabolic spiral, a curve which arises from the supposition that the axis of the common Apollonian parabola is bent round into the periphery of a circle, and is a line then passing through the extremities of the ordinates, which now converge toward the center of the said circle. Harris.