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An aldehyde, C8H9NO3, that is one of several forms of vitamin B6.
(Biochemistry) biochem a naturally occurring derivative of pyridoxine that is a precursor of a coenzyme (pyridoxal phosphate) involved in several enzymic reactions. Formula: (CH2OH)(CHO)C5HN(OH)(CH3)
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|Noun||1.||pyridoxal - a B vitamin that is essential for metabolism of amino acids and starch|