Where does “half-plane” come from?
half-plane (English) comes from English plane, from Middle English plane, from Old French plane, from Latin platanus, from Greek πλάτανος, from Ancient Greek πλάτανος, from Ancient Greek πλατύς, from Proto-Indo-European pléth₂us — flat.
half-plane (English): Either half of an infinite plane
Definitions
- Either half of an infinite plane
Ancestry of “half-plane”, step by step
half-plane traces back through two separate lines of ancestry.
via English plane
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | plane | Of a surface: flat or level; A level or flat... |
| 2 | Middle English | plane | — |
| 3 | Old French | plane | — |
| 4 | Latin | platanus | planetree, sycamore |
| 5 | Greek | πλάτανος | plane tree |
| 6 | Ancient Greek | πλάτανος | planetree |
| 7 | Ancient Greek | πλατύς | wide, broad; flat, level; broad-shouldered |
| 8 | Proto-Indo-European | pléth₂us | flat, broad |
| 9 | Proto-Indo-European | pleth₂- | flat |
via English half
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | half | Consisting of a half; Consisting of some... |
| 2 | Middle English | half | half |
| 3 | Old English | healf | side; half; partly |
| 4 | Proto-Germanic | *halb | — |
| 5 | Proto-Germanic | halbaz | half |
| 6 | Proto-Indo-European | (s)kelH- | to cut; to split, to separate |
| 7 | Proto-Indo-European | (s)kel- | to bend, crook; bent, crooked; leg, heel, knee,... |