radiogoniometer

Etymology tree
Latin radiusder.
English radio-
Proto-Indo-European *ǵónu
Proto-Hellenic *gónu
Ancient Greek γόνῠ (gónŭ)der.
Ancient Greek γωνίᾱ (gōníā)der.
English gonio-
Proto-Indo-European *meh₁-
Proto-Indo-European *-tḗr
Proto-Indo-European *-trom
Proto-Hellenic *-tron
Ancient Greek -τρον (-tron)
Ancient Greek μέτρον (métron)der.
English -meter
English goniometer
English radiogoniometer
From radio- + goniometer.