English
Planoite
From Plano + -ite.
Formed from Plano + -ite
Proto-Indo-European *pleh₂- ‘flat’
…
Proto-Italic *plānos
Latin plānus ‘level, flat, even’
Old Spanish plano
Spanish plano ‘flat’
English Plano
Today it means
noun Someone from Plano, Texas.
Language periods are conventional ranges, not dates for this word.
Etymograph / Planoite