English
pupilometer
From pupil + -o- + -meter.
Formed from pupil + -o- + -meter
Latin pūpus ‘child’
Latin pūpillus ‘orphan, minor’
Anglo-Norman pupille ‘orphan’
Middle English pupille
English pupil
Today it means
noun A device that measures the distance between the pupils of the eyes.
Sources
Sources: Wiktionary, “pupilometer”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / pupilometer