n. weak acid formed from carbon dioxide in water. carboniferous /,ka:ba’mfaras/ adj. 1 producing coal. 2 (Carboniferous) of the fifth period in the Palaeozoic era, with extensive formation of coal. n. (Carboniferous) this period. carbonize rko.:ba,naizi v. (also ise) (zing or sing) 1 convert into carbon. 2 reduce to charcoal or coke. 3 coat with carbon. o carbonization Pzelf(a)n/ n. carbon monoxide n. toxic gas formed by the incomplete burning of carbon. carbon paper n. thin carboncoated paper used for making copies.
