Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  maxim, axiom(noun) a saying that is widely accepted on its own merits. 2  axiom(noun) (logic) a proposition that is not susceptible of proof or disproof; its truth is assumed to be self-evident.
A: Biotin, also known as vitamin B7, is a water soluble B vitamin. Biotin is required, by the body, for cell growth, metabolism of fats and amino acids and the production of fatty acids. Biotin helps with numerous metabolic reactions.
1 Stocksy Biotin Found in foods like peanut butter and bananas, biotin is a B vitamin that supports your skin, nerves, digestive tract, and metabolism. 2  Supplements can be used to help reduce hair loss and encourage nail growth.