A light purple or violet colour.
Particularly, a purple-flowered plant of the species Heliotropium arborescens.
A bloodstone (a variety of quartz).
An instrument, employed in triangulation, that uses a mirror to reflect sunlight toward another, very distant, surveyor.
The fragrance of heliotrope flowers.
A plant that turns so that it faces the sun.
Light purple or violet.
Keeping one’s face turned toward the sun.
A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels.
A simple test of any attribute; a litmus test.
A simple test of acidity in a liquid using litmus, usually in the form of litmus paper.