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turnsole

turnsole is defined in Webster's Unabridged Dictionary (1913) with 1 sense. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Chem.) (a) Litmus. [Obs.] (b) A purple dye obtained from the plant turnsole. See def. 1 (d).

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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