Heliotrope

Part of speech: noun (n.)

1. An instrument or machine for showing when the sun arrived at the tropics and equinoctial line.

2. A plant of the genus Heliotropium; -- called also turnsole and girasole. H. Peruvianum is the commonly cultivated species with fragrant flowers.

3. An instrument for making signals to an observer at a distance, by means of the sun's rays thrown from a mirror.

4. See Bloodstone (a). Heliotrope purple, a grayish purple color.