Ca·lu·sa 
(kə-lsə)
(kə-lsə)n. pl. Calusa or Ca·lu·sas
1. A member of a Native American people formerly inhabiting the southwest coast of Florida from Tampa Bay to the Florida Keys. The Calusa were extinct by the mid-1700s.
2. The extinct language of the Calusa, of unknown linguistic affiliation.
[Calusa, fierce people (sense uncertain); perhaps akin to Choctaw kallo, strong.]