From Longman Dictionary of Contemporary Englishsperm bankˈsperm bank noun [countable] MHa place where semen is kept to be used in medical operations that help women become pregnant
Examples from the Corpus
sperm bank• But where had his Glover genes come from if his father was in a sperm bank?• In person, however, they have matured about as much as a sperm in a deep frozen sperm bank. 