mne·mon·ic 
(nĭ-mŏnĭk)
(nĭ-mŏnĭk)adj.
Relating to, assisting, or intended to assist the memory.
n.
A device, such as a formula or rhyme, used as an aid in remembering.
[Greek mnēmonikos, from mnēmōn, mnēmon-, mindful; see men-1 in the Appendix of Indo-European roots.]
mne·moni·cal·ly adv.