Where does “keratometer” come from?
keratometer (English) comes from English meter, from French mètre, from Latin metrum, from Ancient Greek μέτρον, from Ancient Greek -τρον, from Proto-Hellenic -tron, from Proto-Indo-European -trom, from Proto-Indo-European -tḗr — Derives agent nouns from verbs, denoting someone...
keratometer (English): ophthalmometer
Definitions
- ophthalmometer
Ancestry of “keratometer”, step by step
keratometer traces back through two separate lines of ancestry.
via English meter
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | meter | A device that measures things; A parking meter or... |
| 2 | French | mètre | metre/meter; first-person singular present... |
| 3 | Latin | metrum | a measure |
| 4 | Ancient Greek | μέτρον | something used to measure: measure, rule, weight;... |
| 5 | Ancient Greek | -τρον | Forms instrument nouns |
| 6 | Proto-Hellenic | -tron | Forms instrument nouns from verb stems |
| 7 | Proto-Indo-European | -trom | Forms nouns denoting a tool or instrument |
| 8 | Proto-Indo-European | -tḗr | Derives agent nouns from verbs, denoting someone... |
via English kerato
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | kerato | — |