From Longman Dictionary of Contemporary EnglishX-certificateX-cer‧tif‧i‧cate /ˈeks səˌtɪfɪkət $ -sər-/ adjective, noun AMFan X-certificate film is one that people under 18 are not allowed to see in Britain because it contains sex or violence → PG, R2, U1(2)
Examples from the Corpus
X-certificate• It was still new, exciting, a treat. X-certificate films were within our grasp. 