pyridoxic acid
noun
pyr·i·dox·ic acid
variants:
or 4-pyridoxic acid \ ˌpir-ə-ˌdäk-sik- 
\
\
Medical Definition of pyridoxic acid
: a crystalline acid C8H9NO4 isolated from urine and held to be formed by oxidation of pyridoxal as the major end product of vitamin B6 metabolism