Heliotrope

(he'le-o-trop.) [From Gr. helios, and trope, a turning. ] (Bot.) See HELIOTROPIUM.-(Geodesy.) An apparatus for reflecting the solar rays to a far distance; in trigonometrical surveying it is employed in the transmi ion of signals from one distant station to another. -(Min.) A variety of chalcedony or jasper, of a green color with red spots. [s. 447]