English

tripole

From tri- + pole.

Formed from tri- + pole

Proto-Indo-European *tri- ‘three, threefold’

Proto-Italic *tri- ‘three, tri-’

English tri-

Latin pālus ‘stake, pale, prop, stay’

Proto-West Germanic *pālu ‘pole, stake’

Proto-West Germanic *pāl

Old English pāl ‘a pole, stake, post’

Middle English pole ‘pole, stake, staff’

English pole

Today it means

noun Any system having three poles

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