he·lio·trope /ˈhiliəˌtrop, ˈhiljə, ||ˈhɛljə-/
 天芥菜屬植物,該植物的花香,淡紫色


 He·li·o·trope n.
 1. Anc. Astron. An instrument or machine for showing when the sun arrived at the tropics and equinoctial line.
 2. Bot. 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. Min. See Bloodstone (a).
 Heliotrope purple, a grayish purple color.

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 heliotrope
      n : green chalcedony with red spots that resemble blood [syn: bloodstone]