合ごう成せいガスMeanings1nounsyngas; synthesis gaschemistryTechnical term in chemistry for a fuel gas mixture primarily of hydrogen and carbon monoxide, produced from coal, biomass, or natural gas.合ごう成せいガスは化か学がく工こう業ぎょうの重じゅう要ような原げん料りょうである。Syngas is an important feedstock in the chemical industry.