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Definition of vitamin D noun from the Oxford Advanced Learner's Dictionary

vitamin D

noun
 
/ˌvɪtəmɪn ˈdiː/
 
/ˌvaɪtəmɪn ˈdiː/
[uncountable]
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  1. any one of a group of vitamins found in meat such as liver, fish oils and eggs that are essential for healthy bones and teeth. Vitamin D is also produced by the action of the sun on the skin.
trait
noun
 
 
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