English

hopback

From hop + back.

A compound of hop + back

Proto-Indo-European *kewb- ‘to bend’

Proto-Germanic *huppōną ‘to hop’

Proto-West Germanic *huppōn

Old English hoppian ‘to hop’

Middle English hoppen

English hop

Proto-Germanic *baką ‘back’

Proto-West Germanic *bak

Old English bæc

Middle English bak ‘the back’

English back

Today it means

noun A sealed chamber between the brewing kettle and counter-flow wort chiller, into which hops are added.

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