We don't have synonyms for vitamin d-3 yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are vitamin d, vitamin o and vitamin d3.
(n) :
(biochemistry) 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.
(n) :
(slang, humorous, somewhat vulgar) A dick (“penis”), especially in a sexual context.
(n) :
(biochemistry) 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.
(n) :
(slang, humorous, somewhat vulgar) A dick (“penis”), especially in a sexual context.