Definition of nilometer
: a gauge for measuring the height of water in the Nile especially during its flood; specifically : a graduated scale cut on a natural rock or in the stone wall of a pit communicating with the river
nilometric\¦nīlə¦me‧trik\ adjective, often capitalized
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Origin and Etymology of nilometer
modification (influenced by English -meter) of New Latin nilometrion, from Greek neilometrion, from Neilos Nile, river in Africa + -metrion (from metron measure) — more at measure
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