turnsole /tûrnˈsōl/

1. A plant whose flowers are supposed to face the sun, as heliotrope or the euphorbiaceous Chrozophora tinctoria
2. A deep-purple dye obtained from the latter
3. Litmus

• ultracrepidates
• ultracrepidating
• ultra-distance
• ultrafiche
• ultrafiches
• ultrafilter
• ultrafiltered
• ultrafiltering
• ultrafilters
• ultrafiltrate
• ultrafiltrates
• ultrafiltration
• ultra-heat-treated
• ultra-high
• ultra-high frequency
• ultra-high vacuum
• ultraism
• ultraisms
• ultraist
• ultraists
• ultramarathon
• ultramarathons
• ultramarine
• ultramarines
• ultramicro-