n.
Pronunciation: t ō - ' nä-m ə -t ə r
Function: noun
Etymology: Greek tonos tone + English -meter
Date: 1725
1 : an instrument or device for determining the exact pitch or the vibration rate of tones
2 : an instrument for measuring tension or pressure and especially intraocular pressure
– to · nom · e · try \ t ō - ' nä-m ə -tr ē \ noun