English

sidechannel

From side + channel.

A compound of side + channel

Proto-Germanic *sīdaz ‘drooping’

Proto-Germanic *sīdǭ ‘side’

Old English sīde ‘side’

Middle English side

English side

Akkadian Akkadian form ‘reed’

…

Latin canna ‘reed’

Latin canālis ‘groove’

Old French chanel

Middle English chanel

Today it means

noun An indirect source of information about what a system is doing, such as execution time, version number, etc.

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

Etymograph / sidechannel