carbocationcarbocycliccarbocyclic compoundcarbohydratecarboncarbon blackcarbon chain polymercarbonic acidcarbonizationcarbonylcarbonyl groupcarboranecarborundumcarboxylcarboxyl terminuscarboxylatecarboxylationcarboxylic groupcarburetantcarbureted steelcarcinogencarnot cyclecarnotitecarrier gascartesial axiscartesian coordinatescartridge heatercascade controlcastcast crystalcast ironcast iron ingotcast moldingcastingcastor oilcat crackingcatalysiscatalystcatalytic crackingcatalytic hydrogenationcatalytic reformingcataphorsiscatenationcatformingcathetometercathodecathode rayscathodic picklingcationcation exchange resin