proto-Earth en · PROPN
Etymology
From proto- + Earth.
Meanings
- The planet Earth at an early stage.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| proto-earth | alternative | lexicographic | |
| protoearth | alternative | lexicographic | |
| proto Earth | alternative | lexicographic | |
| Protoearth | alternative | lexicographic |