English

gallnut

From gall + nut.

A compound of gall + nut

Proto-Indo-European *ǵʰelh₃- ‘green, yellow’

Proto-Germanic *gallǭ ‘gall, bile’

Proto-West Germanic *gallā

Old English ġealla ‘gall bladder’

Middle English galle

English gall

Proto-Italic *knuks

…

Proto-Germanic *hnuts

Proto-West Germanic *hnut

Old English hnutu

Middle English note

English nut

Today it means

noun A gall on a tree, caused by insects, that resembles a nut.

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