A method of assisting the memory by artificial contrivances; a system of mnemonics; a mnemonic aid or device.
In early use sometimes specifically with reference to the system devised by Richard Grey, involving the memorizing of rhythmical sequences of words formed by prefixing the initial syllable or syllables of a word or name to letters representing the digits of an associated date, etc.
Mid 18th century; earliest use found in Richard Grey (1696–1771), Church of England clergyman and writer. From classical Latin memoria memory + technica, feminine singular of technicus technical. Coined by Richard Grey.