avitaminosisPronunciation: /eɪˌvɪtəmɪˈnəʊsɪs, -ˌvʌɪt-/Definition of avitaminosis noun (plural avitaminoses /-siːz/) Medicine a condition resulting from a deficiency of a particular vitamin. avitaminosis in other Oxford dictionaries Definition of avitaminosis in the US English dictionary
