A plant of the genus Heliotropium; heliotrope; -- so named because its flowers are supposed to turn toward the sun.
The sunflower.
A kind of spurge (Euphorbia Helioscopia).
The euphorbiaceous plant Chrozophora tinctoria.
Litmus. [Obs.]
A purple dye obtained from the plant turnsole. See def. 1 (d).
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