Where does “photometric” come from?

Photometric comes from French -métrique and Ancient Greek φῶς (light) and μέτρον (measure), ultimately from Proto-Indo-European bʰeh₂- and -trom.

photometric (English): Of or relating to photometry or to photometers;...

Definitions

  1. Of or relating to photometry or to photometers;...

Ancestry of “photometric”, step by step

photometric traces back through two separate lines of ancestry.

via English metric

StepLanguageWordMeaning
1EnglishmetricOf or relating to the metric system of...
2EnglishchronometricOf or pertaining to a chronometer or to...
3English-metricForming adjectives corresponding to nouns in...
4French-métrique-metric
5Latinmetricusmetrical; metric, metrical; metric
6Latinmetruma measure
7Ancient Greekμέτρονsomething used to measure: measure, rule, weight;...
8Ancient Greek-τρονForms instrument nouns
9Proto-Hellenic-tronForms instrument nouns from verb stems
10Proto-Indo-European-tromForms nouns denoting a tool or instrument
11Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via English photo

StepLanguageWordMeaning
1EnglishphotoA photograph; A photo finish; To take a...
2EnglishphotographyThe art and technology of producing images on...
3Frenchphotographiephotography; photograph
4Ancient Greekφωτο-
5Ancient GreekφῶςAttic form of φᾰ́ος
6Proto-Hellenicpʰáos
7Proto-Indo-Europeanbʰéh₂os
8Proto-Indo-Europeanbʰeh₂-to shine, glow light; to speak, say
9Proto-Indo-Europeanbʰeh₂-s-ri-

Words derived from “photometric

Every word from Proto-Indo-European -tḗrEvery word from Ancient Greek -τρονEvery word from Ancient Greek μέτρον