放射性碳碳的一种放射性同位素,尤指碳14 A radioactive isotope of carbon, especially carbon14.
碳化作用烟煤的分解蒸馏,在没有空气的条件下进行,为得到比最初的原料所含碳的百分比大得多的焦煤以及其它馏分 The destructive distillation of bituminous coal, done in the absence of air in order to obtain coke and other fractions having a greater percentage of carbon than the original material.