Hundreds of scientists have been chasing this engram.
British Dictionary definitions for engram
engram
/ˈɛnɡræm/
noun
1.
(psychol) the physical basis of an individual memory in the brain See also memory trace
Derived Forms
engrammic, engrammatic, adjective
Word Origin
C20: from German Engramm, from Greek en-in + gramma letter
engram in Medicine
engram en·gram (ěn'grām') n. A physical alteration thought to occur in living neural tissue in response to stimuli, posited as an explanation for memory. Also called neurogram.