English
topophone
From topo- + -phone.
Proto-Indo-European *bʰeh₂- ‘to shine’
Proto-Hellenic *pʰōnā́
Ancient Greek φωνή ‘sound’
French téléphone
English telephone
English phone
Today it means
noun A double ear trumpet for estimating the direction from which sounds proceed, formerly used by navigators.
Language periods are conventional ranges, not dates for this word.
Etymograph / topophone