Wordnet 3.0
ADJECTIVE (1)
1. 
 of or relating to or involved the practice of aiding the memory; 
- Example: "mnemonic device"[syn: mnemonic, mnemotechnic, mnemotechnical]
The Collaborative International Dictionary of English v.0.48:
mnemotechnical \mnemotechnical\ adj.
   1. same as mnemonic.
   Syn: mnemonic, mnemotechnic.
        [WordNet 1.5]
WordNet (r) 3.0 (2006):
mnemotechnical
    adj 1: of or relating to or involved the practice of aiding the
           memory; "mnemonic device" [syn: mnemonic,
           mnemotechnic, mnemotechnical]