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 -ία (-ía) Ancient Greek -μετρία (-metría)der. Latin -metriader. Old French -métrieder. English -metry English goniometry English rheogoniometry From rheo- + goniometry.

来源：wiktionary