avi·ta·min·o·sis \|āˌvīd.əmə̇ˈnōsə̇s\noun (pluralavitamino·ses \-ōˌsēz\) Etymology: New Latin, from a- (II)+ International Scientific Vocabulary vitamin + New Latin -osis : a disease in man and animals resulting from a deficiency of one or more vitamins — often used in combination to identify the vitamin involved < avitaminosis A > • avi·ta·mi·not·ic\-|näd.ik\adjective