vitamin D(redirected from Vitamin D1)
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vitamin D[′vīd·ə·mən ¦dē]
Either of two fat-soluble, sterol-like compounds, calciferol or ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3); occurs in fish liver oils and is essential for normal calcium and phosphorus deposition in bones and teeth. Also known as antirachitic vitamin.