engram
Concise Oxford English Dictionary © 2008 Oxford University Press:
engram /ˈɛngram/
▶noun a change in the neuronal structure of the brain, representing a memory.
– derivatives
engrammatic adjective.
engrammatic adjective.
– origin early 20th cent.: from Ger. Engramm, from Gk en- ‘within’ + gramma ‘letter of the alphabet’.
'engram' also found in these Oxford entries:

