Definition of barillas:
(n) :
The alkali produced from the plant, an impure carbonate of soda, used for making soap, glass, etc., and for bleaching.
(n) :
Impure soda obtained from the ashes of any seashore plant, or kelp.
(n) :
(botany) Any of several not closely related saltmarsh plants that were once burnt to obtain soda ash, such as Soda inermis.
(n) :
A surname from Italian.