Where does “photoreagent” come from?

photoreagent (English) comes from English reagent, from Latin reago, from Latin rĕ-, from Latin prōdūcō, from Latin prō-, from Proto-Italic *pro-, from Proto-Indo-European pro-, from Proto-Indo-European por- — passed , crossed.

photoreagent (English): (chemistry) Any photochemical reagent

Definitions

  1. (chemistry) Any photochemical reagent

Ancestry of “photoreagent”, step by step

photoreagent traces back through two separate lines of ancestry.

via English reagent

StepLanguageWordMeaning
1EnglishreagentA compound or mixture of compounds used to treat...
2LatinreagoI act upon again, I do again; I react
3Latinrĕ-back, backwards
4Latinprōdūcōto lead or bring forth, forward or out
5Latinprō-forward direction, forward movement
6Proto-Italic*pro-pro- see the Latin entry for further meanings
7Proto-Indo-Europeanpro-toward, forward
8Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
9Proto-Indo-Europeanper-before, in front; first; to go through
10Proto-Indo-Europeanpr̥tóspassed , crossed

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-
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Latin rĕ-