10 letters · 16 points in Scrabble
noun an image (usually a negative image) that persists after stimulation has ceased
originEtymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Indo-European *-teros Proto-Indo-European *h₂ep(o)teros Proto-Germanic *after Old English æfter Middle English after English after ▲ Old English æfter Old English æfter- Middle English after- English after- English image English afterimage From after- + image.
Etymology from Wiktionary, CC BY-SA 3.0