A device or instrument for measuring the size of the pupil of the eye.
Origin
Mid 19th century; earliest use found in The British Medical Journal. Partly from classical Latin pūpillapupil + -ometer, and partly from pupil + -ometer.
Definition of pupillometer in US English:
pupillometer
(also pupilometer)
nounˌpjuːpɪˈlɒmɪtə
A device or instrument for measuring the size of the pupil of the eye.
Origin
Mid 19th century; earliest use found in The British Medical Journal. Partly from classical Latin pūpilla pupil + -ometer, and partly from pupil + -ometer.