Meanings
proper noun
alternative proto-earth · alternative protoearth · alternative proto Earth · alternative Protoearth
- The planet Earth at an early stage.
Origin
Cite this entry
APA
proto-Earth. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/proto-Earth
MLA
“proto-Earth.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/proto-Earth. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “proto-Earth,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/proto-Earth.
Source: proto-Earth on Wiktionary, CC BY-SA 4.0.