English
longitudinal wave
From longitudinal + wave.
A compound of longitudinal + wave
Proto-Indo-European *dlongʰos ‘long’
Proto-Italic *(d)longos ‘long’
Latin longus ‘far, long’
Latin longitūdō ‘length, longitude’
English longitudinal
Proto-Indo-European *webʰ- ‘to weave, braid’
Proto-Germanic *wabōną
Proto-West Germanic *wabōn
Old English wafian ‘to wave’
Middle English waven ‘to shake’
English wave
Today it means
noun Any wave in which the direction of disturbance is parallel to the direction of travel.
Language periods are conventional ranges, not dates for this word.
Etymograph / longitudinal wave