9 letters · 11 points in Scrabble
noun measuring instrument for measuring tension or pressure (especially for measuring intraocular pressure in testing for glaucoma)
originEtymology tree Proto-Indo-European *ten- Proto-Indo-European *-os Proto-Indo-European *tónos Proto-Hellenic *tónos Ancient Greek τόνος (tónos)der. English tono- 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 tonometer From tono- + -meter.
Etymology from Wiktionary, CC BY-SA 3.0