tornassol

Etymology
.

Noun

 * 1) sheen, iridescence
 * 2)  turnsole dyestuff extracted from dyer's croton
 * 3) litmus dyestuff extracted from lichens
 * 1)  turnsole dyestuff extracted from dyer's croton
 * 2) litmus dyestuff extracted from lichens

Etymology
From.

Noun

 * 1)  litmus dyestuff extracted from lichen
 * 2) sunflower any plant of the genus, characterised by their large, yellow floral head