metacontrast
/ˌmɛtəˈkɒntrɑːst/ /ˌmɛtəˈkɒntrast/Psychology
noun
Alteration, especially diminution, of the response to a visual stimulus as a result of a second stimulus following soon afterwards.
Origin
1950s; earliest use found in Journal of the Optical Society of America. From meta- + contrast, after German Metakontrast.