N-COUNT [oft NOUN n] 助记代号，助记口诀(指帮助记忆科学定律、拼写规则等的单词、小诗、句子等) A mnemonic is a word, short poem, or sentence that is intended to help you remember things such as scientific rules or spelling rules. For example, 'i before e, except after c' is a mnemonic to help people remember how to spell words like 'believe' and 'receive'. 助记代号，助记口诀(指帮助记忆科学定律、拼写规则等的单词、小诗、句子等)