Meanings
nounprotogroup (plural protogroups)
plural protogroups
- astronomyA number of galaxies that become a galaxy group over time
Origin
Cite this entry
APA
protogroup. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/protogroup
MLA
“protogroup.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/protogroup. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “protogroup,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/protogroup.
Source: protogroup on Wiktionary, CC BY-SA 4.0.