English
headloss
From head + loss.
Proto-Indo-European *kap- ‘head’
…
Proto-Germanic *haubudą ‘head’
Proto-West Germanic *haubud
Old English hēafod ‘head’
Middle English heed ‘head’
English head
Proto-Indo-European *lews- ‘to cut’
Proto-Germanic *lusą ‘dissolution’
Proto-West Germanic *los
Old English los ‘damage’
Middle English los
English loss
Today it means
noun The difference in pressure between points in a hydraulic system of piping as a result of friction, elevation change etc.
Language periods are conventional ranges, not dates for this word.
Etymograph / headloss