Where does “photochromogen” come from?

photochromogen (English) comes from English chromogen, from English Gen, from English again, from Middle English agayn, from Old English onġēan, from Old English on-, from Old English and-, from Proto-West Germanic anda- — on, onto.

photochromogen (English): A microorganism whose pigmentation develops...

Definitions

  1. A microorganism whose pigmentation develops...

Ancestry of “photochromogen”, step by step

photochromogen traces back through two separate lines of ancestry.

via English chromogen

StepLanguageWordMeaning
1EnglishchromogenAny substance that lacks colour, but can be...
2EnglishGenA member of the Gen Movement, a youth expression...
3EnglishagainAnother time; once more; Over and above a factor...
4Middle Englishagaynagain
5Old Englishonġēanopposite
6Old Englishon-forming verbs and adjectives from participles and...
7Old Englishand-against, opposing; in return, back; facing,...
8Proto-West Germanicanda-against, opposing; in return, back; facing,...
9Proto-Germanicanda-against, opposing; un-, de-
10Proto-Indo-Europeanh₂éntiopposite; near; in front
11Proto-Indo-Europeanh₂éntsforehead; front
12Proto-Indo-Europeanh₂ent-face; forehead; front
13Proto-Indo-Europeanh₂en-on, onto

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 h₂en-Every word from Proto-Indo-European h₂ent-Every word from Proto-Indo-European h₂énts