gamˈbyüzh(ē)ə noun
Etymology: New Latin, modification of American Spanish (Cuban) gambusino gambusia
1. capitalized : a genus of topminnows (family Poeciliidae) of the warmer parts of No. America and the West Indies that feed largely on aquatic larvae and have been introduced as valuable exterminators of mosquito larvae
2. plural gambusia or gambusias : any fish of the genus Gambusia