English
proplanetary
From pro- + planetary.
A compound of pro- + planetary
Proto-Indo-European *pér ‘through’
Proto-Indo-European *pró ‘forwards, before’
Proto-Italic *prō ‘in front of, before’
Latin prō ‘in favor of, on behalf of’
English pro-
Today it means
adj Of or pertaining to the early stages in the formation of a planet.
Sources
Sources: Wiktionary, “proplanetary”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / proplanetary