ˌpirəˈdäksəl, -ˌsal noun
( -s )
Etymology: International Scientific Vocabulary pyridox ine + -al
: a crystalline aldehyde C 8 H 9 NO 3 obtainable by oxidation of pyridoxine that is a member of the vitamin B 6 group and occurs in the form of a phosphate active as a coenzyme (as in decarboxylation and transamination); 3-hydroxy-5-(hydroxymethyl)-2-methyl-isonicotinaldehyde — compare codecarboxylase