1. <botany> 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.

2. <chemistry> Litmus. A purple dye obtained from the plant turnsole. See def. 1 .

Origin: F. Tournesol, It. Tornasole; tornare to turn (LL. Tornare) + sole the sun, L. Sol. See Turn, Solar, and cf. Heliotrope

Alternative forms: turnsol.

(01 Mar 1998)

turnover flap, turnover number, turnpike, turn-sick < Prev | Next > turnspit, turnstone, turnus, turonian

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