English
protobinary
From proto- + binary.
Proto-Indo-European *pér ‘through’
Proto-Indo-European *pró ‘forwards, before’
Proto-Hellenic *pró
Ancient Greek πρό ‘before’
Ancient Greek πρῶτος ‘first’
English proto-
Proto-Indo-European *dwóh₁ ‘two’
…
Proto-Italic *dwiznos
Latin bīnus ‘occurring twice, twofold, double, binary’
Late Latin bīnāriu
Middle English binarie
English binary
Today it means
adj Describing a system that is evolving into a binary star.
Sources
Sources: Wiktionary, “protobinary”. 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 / protobinary