photogene

== English == === Pronunciation === IPA(key): /ˈfəʊtəʊd͡ʒiːn/ === Etymology 1 === From photo- + -gene. ==== Noun ==== photogene (plural photogenes) (obsolete) A photograph. (archaic) An afterimage. 1864-1898, Herbert Spencer, Principles of Biology In youth , the visual apparatus is so quickly restored to its state of integrity , that many of these photogenes, as they are called , cannot be perceived . === Etymology 2 === From photo- + gene. ==== Noun ==== photogene (plural photogenes) (genetics) A gene involved in photosynthesis.