炭たん酸さん固こ定ていMeaningsNoun1. carbon fixation; carbon assimilationKanji used炭charcoal酸acid固solidify定defineComposed of炭たん酸さんcarbonic acid; carbonated water; carbonated drink; baking soda; sodium carbonateNoun固こ定ていfixing (in place); being fixed (in place); securing; anchoring; fastening down; fixing (e.g. salary, capital); keeping the same; fixation (histology)Noun