spetsiaalses gaasigeneraatoris söe, turba jms lähtematerjali gaasistamisega toodetav küttegaas, mille koostisosad on peamiselt süsinikmonoksiid (CO), vesinik (H2) ja lämmastik (N2) (vt gaasistus), a combustible gas manufactured by blowing a mixture of steam and air upwards through a bed of carbonaceous material such as coke, or coal such that the fuel is completely gasified; gas mainly consists of carbon monoxide (CO), hydrogen (H2) as well as substantial amount of nitrogen (N2) (see: gasification)