Main Entry: hy·perm·ne·sia

Pronunciation: \ˌhī-(ˌ)pərm-ˈnē-zh(ē-)ə\

Function: noun

Etymology: New Latin, from hyper- + -mnesia (as in amnesia)

Date: 1882

: abnormally vivid or complete memory or recall of the past

— hy·perm·ne·sic \-ˈnē-zik, -sik\ adjective