English
keyscan
From key + scan.
Proto-Indo-European *skend- ‘to jump, dart, climb, scale, scan’
Proto-Italic *skandō
Latin scandō ‘to climb, rise, mount’
Middle English scanden ‘to scan verse’
Middle English scanne ‘to mark off verse to show metrical structure’
English scan
Today it means
noun The process of scanning the state of a keyboard to determine which keys are being pressed.
Language periods are conventional ranges, not dates for this word.
Etymograph / keyscan