nutritional deficiency disease vitamin deficiency disorder A disorder that is caused by the deficiency of a vitamin. The deficiency may result from either suboptimal vitamin intake or conditions that prevent the vitamin's use or absorption in the body. Representative examples include beriberi caused by thiamine deficiency, scurvy caused by vitamin C deficiency, and rickets caused by vitamin D deficiency. Avitaminoses EFO:0005878 ICD9:269.1 ICD9:269.2 MESH:D001361 MONDO:0024298 NCIT:C35772 SCTID:85670002 UMLS:C0376286 UMLS:C1510471 avitaminosis deficiencies, vitamin deficiency, vitamin vitamin deficiencies vitamin deficiency vitamin deficiency disorder