What does "turnsole" mean?
Turnsole: (Chem.) (a) Litmus. [Obs.] (b) A purple dye obtained from the plant turnsole. See def. 1 (d).
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00