Vitamin d

noun, slang

Definitions

Noun
  1. 1
    Any of a number of fat-soluble vitamins, required for normal bone development and that prevents rickets; can be manufactured in the skin on exposure to sunlight. uncountable
  2. 2
    a fat-soluble vitamin that prevents rickets wordnet
  3. 3
    A dick (“penis”), especially in a sexual context. humorous, slang, uncountable, vulgar

Etymology

From vitamin + D (“4th letter”). From being the fourth vitamin discovered. Coined in 1922 by Elmer McCollum, who discovered the vitamin.

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