English

gyroaverage

From gyro- + average.

Proto-Indo-European *gew- ‘to curve, to bend’

Ancient Greek γῦρος ‘circle’

English gyro-

Old Italian avaria

Old French avarie

Middle French avarie ‘damage to ship or cargo’

Today it means

noun The average over a gyroperiod; a gyrophase average.

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

Etymograph / gyroaverage