Heliotrope
Heliotrope , noun
[French héliotrope, Latin heliotropium, Greek {not transcribed}; {not transcribed} the sun + {not transcribed} to turn, {not transcribed} turn. See Heliacal, Trope.]
1.
(Anc. Astronomy) An instrument or machine for showing when the sun arrived at the tropics and equinoctial line.
2.
(Botany) A plant of the genus Heliotropium; -- called also turnsole and girasole. Heliotropium Peruvianum is the commonly cultivated species with fragrant flowers.
3.
(Geodesy & Signal Service) An instrument for making signals to an observer at a distance, by means of the sun's rays thrown from a mirror.
4.
(Mineralogy) See Bloodstone (a).
Collocations (1)
Heliotrope purple , a grayish purple color.