From Longman Dictionary of Contemporary Englishmnemonicmne‧mon‧ic /nɪˈmɒnɪk $ nɪˈmɑː-/ noun [countable] SLSEsomething such as a poem or a sentence that you use to help you remember a rule, a name etc —mnemonic adjective
Examples from the Corpus
mnemonic• The incense is a perfect mnemonic for Zanzibar.• He talked about the effective use of time, mnemonic tricks, and various kinds of tests.Origin mnemonic (1700-1800) Greek mnemonikos, from mimneskesthai “to remember” 