Where does “petahertz” come from?
petahertz (English) comes from English Hertz, from German Hertz, from German Herz, from Middle High German herze, from Old High German herza, from Proto-West Germanic hertā, from Proto-Germanic hertô, from Proto-Indo-European ḱḗr — heart.
petahertz (English): An SI unit of frequency equal to 1015 hertz
Definitions
- An SI unit of frequency equal to 1015 hertz
Ancestry of “petahertz”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | English | Hertz | Alternative letter-case form of hertz |
| 2 | German | Hertz | hertz; Obsolete spelling of Herz |
| 3 | German | Herz | heart; hearts; sweetheart, darling |
| 4 | Middle High German | herze | — |
| 5 | Old High German | herza | heart |
| 6 | Proto-West Germanic | hertā | heart |
| 7 | Proto-Germanic | hertô | heart |
| 8 | Proto-Indo-European | ḱḗr | heart |