spermicide
From Longman Dictionary of Contemporary Englishspermicidesper‧mi‧cide /ˈspɜːmɪsaɪd $ ˈspɜːr-/ noun [countable, uncountable] MHSYa cream or liquid that kills sperm, used while having sex to prevent the woman from becoming pregnant —spermicidal /ˌspɜːməˈsaɪdl◂ $ ˌspɜːr-/ adjective [only before noun] spermicidal creamExamples from the Corpusspermicide• The spermicide didn't stay hostile to sperm for more than a few hours.