ˈga]d.ə(r)mənˈkȯk-, ˈgä], -kȯḵ-, -kōk-, -käk- noun
Usage: usually capitalized G&K
Etymology: after Ludwig Gattermann died 1920 and J.A. Koch fl 1897 German chemists
: a synthesis of an aldehyde from an aromatic hydrocarbon, carbon monoxide, hydrogen chloride, and a catalyst containing aluminum chloride