mnemonic

Definitions:

Assisting the memory.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
The art or science of assisting the memory; a system of rules, etc., intended to aid the memory.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n. pl.) (noun plural)

Usage examples:

7. Memory devices: The effects of cramming- Remembering isolated facts- Mnemonic devices.
- The Mind and Its Education by George Herbert Betts
When I reach a town I put up by chance, I see things by chance, leave on an impulse, and carry away precious glimpses of nothing in particular that I can piece together at leisure into a sort of mnemonic mosaic.
- An Ocean Tramp by William McFee
Reynolds tells quaint stories of his adventures with the sketch- book in the pages of which are to be found the hurried notes- often but a few strokes and scratches intended to serve as a mnemonic upon which his finished drawings and sketches were based.
- Frank Reynolds, R.I. by A.E. Johnson