Where does “photoentrain” come from?
photoentrain (English) comes from English entrain, from English train, from Middle English train, from Old French train, from Old French traïner, from Vulgar Latin traginare, from Latin tragēre, from Latin trahere — to run.
photoentrain (English): To entrain a circadian rhythm by means of light
Definitions
- To entrain a circadian rhythm by means of light
Ancestry of “photoentrain”, step by step
photoentrain traces back through two separate lines of ancestry.
via English entrain
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | entrain | To draw along as a current does; To suspend small... |
| 2 | English | train | Elongated portion; Connected sequence of people... |
| 3 | Middle English | train | — |
| 4 | Old French | train | a delay, a drawing out |
| 5 | Old French | traïner | Alternative form of trainer; to pull out, to draw |
| 6 | Vulgar Latin | traginare | present active infinitive of *traginō |
| 7 | Latin | tragēre | — |
| 8 | Latin | trahere | second-person singular future passive indicative... |
| 9 | Latin | traho | I drag, pull; I trail; I extract, withdraw |
| 10 | Proto-Italic | traɣō | — |
| 11 | Proto-Indo-European | tregʰ- | to drag, pull?; to run, walk |
| 12 | Proto-Indo-European | dʰregʰ- | to run |
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- | — |