From Longman Dictionary of Contemporary Englishweb-footedˌweb-ˈfooted adjective 
HBAHBBhaving toes that are joined by pieces of skin
HBAHBBhaving toes that are joined by pieces of skinExamples from the Corpus
web-footed• Biologists think the 24-acre lake can support 50 web-footed residents without major environmental harm, Doeing said. 