English
marginalism
From marginal + -ism.
A compound of marginal + -ism
Proto-Indo-European *mórǵs ‘boundary, border’
Latin margō ‘margin’
Medieval Latin marginālis
English marginal
Today it means
noun The use of marginal analysis to solve large classes of microeconomic problems.
Language periods are conventional ranges, not dates for this word.
Etymograph / marginalism