vitalometer
A device used to test the vitality of the dental pulp.
A vitalometer is a device which is applied to a tooth to test whether the low voltage current flowing through the tooth from the vitalometer is felt by the pulp of the tooth. If the tooth is nonvital (dead), there will be no reaction. However, if the pulp is alive, the patient will receive a sensation as current is applied.
Where it comes from
From Latin vīta (“life”), from vīvō (“to live”), + -ometer.
Adapted from the Wiktionary entry vitalometer (CC BY-SA 4.0).