1. (noun) an agency in the Department of the Interior that conserves and protects fish and wildlife and their habitats; assesses the environmental impact of pesticides and nuclear power site and hydroelectric dams and thermal pollution

• united states fish and wildlife service
• us fish and wildlife service

1. (noun) an agency in the Department of the Interior that conserves and protects fish and wildlife and their habitats; assesses the environmental impact of pesticides and nuclear power site and hydroelectric dams and thermal pollution

• agency
• authority
• bureau
• federal agency
• government agency
• office