coefficient of rigiditycoenzymecofactorcoherencecoherence distancecoherence lengthcoherentcoherent lightcoherent scatteringcohesioncohesive energycohesive forcecoinage metalscold finger condensercold lightcold rubbercold shortnesscollapsecollecting teecollective electrodecollective propertiescollision energycollision frequencycollision ratecolloidcolloidal statecolloidal suspensioncolophonycolorcolored crystalcolorimetercolorimetrycolumncolumn chromatographycolve oilcombinationcombination bandscombining volumes principlecombustiblecombustioncommercial purecommon ion effectcommunicationg vesselscommutationcommutation relationcommutation rulescommutative groupcommutative lawcommutatorcomonomer