| 1. | an instrument for measuring the frequencies of tones, as a tuning fork or a graduated set of tuning forks. |
| 2. | any of various physiological instruments for measuring intraocular pressure or blood pressure. |
| 3. | Physical Chemistry. an instrument for measuring vapor pressure. |
tonometer to·nom·e·ter (tō-nŏm'ĭ-tər)
n.
Any of various instruments for measuring pressure or tension, especially one used in tonography.