adj litmus.
2. turnsole ·adj the sunflower.
3. turnsole ·adj a kind of spurge (euphorbia helioscopia).
4. turnsole ·adj the euphorbiaceous plant chrozophora tinctoria.
5. turnsole ·adj a purple dye obtained from the plant turnsole. ·see def. 1 (d).
6. turnsole ·adj a plant of the genus heliotropium; heliotrope;
so named because its flowers are supposed to turn toward the sun.