Where does “photoequivalence” come from?
photoequivalence (English) comes from English photo, from English photography, from French photographie, from Ancient Greek φωτο-, from Ancient Greek φῶς, from Proto-Hellenic pʰáos, from Proto-Indo-European bʰéh₂os, from Proto-Indo-European bʰeh₂-.
photoequivalence (English): equivalence, as described by the Stark-Einstein law
Definitions
- equivalence, as described by the Stark-Einstein law
Ancestry of “photoequivalence”, step by step
photoequivalence traces back through two separate lines of ancestry.
via English photo
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | photo | A photograph; A photo finish; To take a... |
| 2 | English | photography | The art and technology of producing images on... |
| 3 | French | photographie | photography; photograph |
| 4 | Ancient Greek | φωτο- | — |
| 5 | Ancient Greek | φῶς | Attic form of φᾰ́ος |
| 6 | Proto-Hellenic | pʰáos | — |
| 7 | Proto-Indo-European | bʰéh₂os | — |
| 8 | Proto-Indo-European | bʰeh₂- | to shine, glow light; to speak, say |
| 9 | Proto-Indo-European | bʰeh₂-s-ri- | — |
via English equivalence
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | equivalence | The condition of being equivalent or essentially... |
| 2 | French | équivalence | equivalence |
| 3 | Latin | aequivalentia | equal force or value, equivalence |
| 4 | Latin | aequivalēns | being equivalent, having equal power; equivalent |
| 5 | Latin | aequivaleō | to be equivalent, have equal power |
| 6 | Latin | valeō | to have strength, influence, power; to avail |
| 7 | Proto-Italic | walēō | to be strong |
| 8 | Proto-Indo-European | h₂wl̥h₁éh₁yeti | — |
| 9 | Proto-Indo-European | h₂welh₁- | to rule; strong, powerful; hair; wool |