English
equinumerosity
From equi- + numerosity.
A compound of equi- + numerosity
Proto-Indo-European *nem-
Proto-Italic *nomezos
Latin numerus ‘number’
Latin numerōsus ‘numerous, abundant’
Latin numerositas ‘rhythm, harmony’
English numerosity
Today it means
noun The state or quality of being equinumerous.
Language periods are conventional ranges, not dates for this word.
Etymograph / equinumerosity