From Longman Dictionary of Contemporary Englishathlete's footˌathlete’s ˈfoot noun [uncountable] MIa medical condition in which the skin between your toes cracks
Examples from the Corpus
athlete's foot• Fungus infections like thrush and athlete's foot thrive in warm, damp conditions.• People Join in the toe-sucking antics of Fergie and David Mellor without the risk of athlete's foot.• No wonder his feet perspire profusely and are prone to athlete's foot. 