rheogoniometry

Etymology tree
Proto-Indo-European *ser-?
Proto-Indo-European *srew-
Proto-Indo-European *sréweti
Proto-Hellenic *hréwō
Ancient Greek ῥέω (rhéō)
English rheo-
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)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-i-eh₂
Proto-Hellenic *-íā
Ancient Greek -ῐ́ᾱ (-ĭ́ā)
Ancient Greek -μετρία (-metría)der.
Latin -metriader.
Old French -métrieder.
English -metry
English goniometry
English rheogoniometry
From rheo- + goniometry.