|nȯ(r)ˌdī|hīdrō|g(w)īə|red.ik- noun
Etymology: nordihydroguaiaretic from nor- + dihydr- + guaiaretic (in guaiaretic acid C 20 H 24 O 4 ) (International Scientific Vocabulary guaia- — from New Latin Guaiacum — + ret- — from Greek rhētinē resin — + -ic )
: a crystalline derivative [(HO) 2 C 6 H 3 CH 2 CH(CH 3 )−] 2 of pyrocatechol obtained especially from the creosote bush or made synthetically and used in trace amounts as an antioxidant to prevent rancidity of lard and other fats or oils — abbr. NDGA