Any of a group of organic compounds that are essential for normal growth and nutrition and are required in small quantities in the diet because they cannot be synthesized by the body.
More example sentences
- Not so long ago, most people would not have had an ideal regular intake of vitamin C, a vitamin the human body cannot synthesize.
- This is due to a lack of thiamine, a vitamin that is essential for the mechanisms by which energy is released from foodstuffs.
- Other genes, to make the plant synthesise essential amino acids and vitamins, can also be added.
early 20th century: from Latin vita 'life' + amine, because vitamins were originally thought to contain an amino acid.
Definition of vitamin in:
- The British & World English dictionary