photoconductivityPronunciation: /ˌfəʊtə(ʊ)kɒndʌkˈtɪvɪti/Definition of photoconductivity noun [mass noun] increased electrical conductivity caused by the presence of light. Derivatives photoconductivePronunciation: /-kənˈdʌktɪv/ adjective photoconductorPronunciation: /-kənˈdʌktə/ noun photoconductivity in other Oxford dictionaries Definition of photoconductivity in the US English dictionary