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noun vitamin D n. Any of several chemically related fat-soluble vitamins that prevent rickets. It is found in fish-liver oils, egg yolks and milk. Component vitamin D2 is also called calciferol, and vitamin D3 is called cholecalciferol. Synonyms: calciferol, ergocalciferol, cholecalciferol.
Collaborative International Dictionary of English 0.48
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