English
flowrate
From flow + rate.
Proto-Germanic *flōaną ‘to flow’
Proto-West Germanic *flōan ‘to flow’
Old English flōwan ‘to flow’
Middle English flowen
Middle English flowe
English flow
Proto-Indo-European *h₂reh₁- ‘to think’
…
Latin prō ratā parte ‘according to a fixed part’
Medieval Latin rata
Old French rate
Middle English rate
English rate
Today it means
noun The rate of flow, usually of a fluid, measured in either volume or mass per unit time.
Language periods are conventional ranges, not dates for this word.
Etymograph / flowrate