"Senna" is a word that refers to a type of plant or tree. It is known for its leaves, which are used in herbal medicine as a laxative to help with digestion. Full definition
It was part of the F1 calendar until 2006, going through a major transformation over the years — particularly after the death of Ayrton Senna in 1994 and then following its exit from F1. (wtf1.com)
Also check out our story on the McLaren Senna GTR Concept. (topspeed.com)
Helps Make It Easy is a combination of senna leaves and fruits, licorice, anise, lemon balm and peppermint which will help you... (shopgourmet.com)