-ometer

suffix

instrument for automatically measuring something

Wiktionary

suffix

Etymology: Etymology tree Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- 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 -ometer From -o- + -meter.

Alternative form of -meter.