heliotrope
/ˈhiːlɪətrəʊp/noun
1- a plant of the borage family, cultivated for its fragrant purple or blue flowers which are used in perfume天芥菜属植物。
1.1
- Genus Heliotropium, family Boraginaceae.天芥菜属, 紫草科。
1.2
- mass noun a light purple colour, similar to that typical of heliotrope flowers淡紫色（与天芥菜花颜色相似）。
词源
Old English eliotropus (originally applied to various plants whose flowers turn towards the sun), via Latin from Greek hēliotropion 'plant turning its flowers to the sun', from hēlios 'sun' + trepein 'to turn'. The spelling was influenced by French héliotrope.