RpE: /nəˈmɒnᵻk/, AmE: /nɛˈmɑːnɪk/ the first "m" is silent

Noun: mnemonic - a device (such as a rhyme or acronym) used to aid recall
Adj.: mnemonic - of or relating to or involved the practice of aiding the memory; "mnemonic device" (memorymnemonic)

Definitions

1. something intended to assist the memory, as a verse or formula.
2. a symbol, acronym, or other short form used as a computer code or function, as in programming.
3. a cyberpunk action thriller film "Johnny Mnemonic" from 1995.

Etymologies

The word "mnemonic" is derived from the Ancient Greek word μνημονικός (mnēmonikos). from mnēmōn, mnēmon-, mindful;
From New Latin mnemonicus, from Ancient Greek μνημονικός (mnēmonikos, "of memory"), from μνήμον ("remembering, mindful"),
from μνᾶσθαι (mnasthai, "to remember"), from Proto-Indo-European *men- (“to think”);

# mnemonix