['ɑ:ftәsenˏseiʃɚn]
n.
(=afterimage)[心]余像, 余留感觉

[ noun ]
an image (usually a negative image) that persists after stimulation has ceased
<noun.cognition>

Aftersensation \Aft"er*sen*sa`tion\, n. (Psychol.)
A sensation or sense impression following the removal of a
stimulus producing a primary sensation, and reproducing the
primary sensation in positive, negative, or complementary
form. The aftersensation may be continuous with the primary
sensation or follow it after an interval.
[Webster 1913 Suppl.]