noun ·see bloodstone (a).
2. heliotrope ·noun an instrument or machine for showing when the sun arrived at the tropics and equinoctial line.
3. heliotrope ·noun an instrument for making signals to an observer at a distance, by means of the sun's rays thrown from a mirror.
4. heliotrope ·noun a plant of the genus heliotropium;
called also turnsole and girasole. h. peruvianum is the commonly cultivated species with fragrant flowers.