Where does “orthokeratology” come from?
orthokeratology (English) comes from English ortho-, from Ancient Greek ὀρθός, from Proto-Hellenic ortʰwós, from Proto-Indo-European h₃r̥dʰwós, from Proto-Indo-European h₃erdʰ-, from Proto-Indo-European -wós — Creates adjectives from verb stems.
orthokeratology (English): The creation of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors
Definitions
- The creation of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors
Ancestry of “orthokeratology”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | ortho- | straight, right, proper; Having an extra... |
| 2 | Ancient Greek | ὀρθός | straight, upright, erect; straight forward, in a... |
| 3 | Proto-Hellenic | ortʰwós | — |
| 4 | Proto-Indo-European | h₃r̥dʰwós | — |
| 5 | Proto-Indo-European | h₃erdʰ- | to increase, grow; upright, high |
| 6 | Proto-Indo-European | -wós | Creates adjectives from verb stems |