mne ‧ mon ‧ ic /nɪˈmɒnɪk $ nɪˈmɑː-/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Language: Greek ; Origin: mnemonikos , from mimneskesthai 'to remember' ]
something such as a poem or a sentence that you use to help you remember a rule, a name etc
—mnemonic adjective