English

keyplate

From key + plate.

A compound of key + plate

Proto-West Germanic *kaiju

Old English cǣġ ‘key’

Middle English keye ‘a key’

English key

Proto-Indo-European *pleth₂- ‘flat’

…

Vulgar Latin *plattus ‘flat’

Medieval Latin plata

Old French plate ‘a flat metal disk’

Middle English plate

English plate

Today it means

noun The plate that prints the detail in an image.

Language periods are conventional ranges, not dates for this word.

Etymograph / keyplate