次じ酸さん化か炭たん素そMeaningsNoun1. carbon suboxideKanji used次next酸acid化transformation炭charcoal素elementaryComposed of次じnext; hypo- (i.e. containing an element with low valence); order; sequence; time; timesPrefix酸さん化かoxidation; oxidizationNoun炭たん素そcarbon (C)Noun