Where does “sunphotometer” come from?

sunphotometer (English) comes from English photometer, from English -meter, from French mètre, from Latin metrum, from Ancient Greek μέτρον, from Ancient Greek -τρον, from Proto-Hellenic -tron, from Proto-Indo-European -trom — Derives agent nouns from verbs, denoting someone...

sunphotometer (English): A photometer used to measure the intensity of...

Definitions

  1. A photometer used to measure the intensity of...

Ancestry of “sunphotometer”, step by step

sunphotometer traces back through two separate lines of ancestry.

via English photometer

StepLanguageWordMeaning
1EnglishphotometerAny of several instruments used to measure...
2English-meterUsed to form the names of measuring devices
3Frenchmètremetre/meter; first-person singular present...
4Latinmetruma measure
5Ancient Greekμέτρονsomething used to measure: measure, rule, weight;...
6Ancient Greek-τρονForms instrument nouns
7Proto-Hellenic-tronForms instrument nouns from verb stems
8Proto-Indo-European-tromForms nouns denoting a tool or instrument
9Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via English Sun

StepLanguageWordMeaning
1EnglishSunAbbreviation of Sunday
2Middle EnglishsunneAlternative form of sonne; sun
3Old Englishsunnesun
4Proto-West Germanicsunnāsun
5Proto-Germanicsunnǭthe sun
6Proto-Indo-Europeansh̥₂uénsun; the Sun
7Proto-Indo-Europeansóh₂wl̥sun
Every word from Proto-Indo-European -tḗr