English
racon
Blend of radar + beacon.
Vulgar Latin *rencus ‘row’
Old French reng ‘place’
Old French rengier ‘to line up’
Middle English rengen
English range
English radar
Proto-Indo-European *bʰeh₂- ‘to shine, glow light’
Proto-Germanic *baukną ‘sign, symbol’
Proto-West Germanic *baukn ‘sign, symbol, signal’
Old English bēacn ‘sign, signal’
Middle English beken ‘a beacon’
English beacon
Today it means
noun A beacon that, on detecting a radar signal, responds by transmitting a coded navigation signal.
Language periods are conventional ranges, not dates for this word.
Etymograph / racon