flowering tops of unfertilised plants. From the Spanish for 'seedless'. Usually shortened to 'sinse' or 'sensi' and shouted at you as you exit Brixton tube in London
A form of marijuana obtained from the unpollinated or seedless portion of the cannabis plant. It has a higher THC concentration than regular marijuana, as high as 6 percent” ( Levinthal, 141).
There are male and female marijuana plants. The flowers of the female marijuana contain the highest concentration of THC. Growers have learned that if the female plants are not allowed to be pollinated the flowers cluster and excrete greater quantities of resin. Marijuana grown like this is called "Sinsemilla" which simply means "no seeds".