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The act of temporarily forgetting an acronym, and needing to look it up, or ask a friend what it stands for.
"What's SMH again? Darn it, I KNOW THIS. I guess I'm having another fit of acronesia..."
by thefoldrock February 15, 2012
complete or partial loss of memory of the words represented by an acronym.
"ESPN stands for, uh, something Sports something Network. I've got acronesia!"
by William McAtinney May 27, 2009