Where did the word partons come from?

Answer 1

"Parton" was a term coined in 1969 by Richard Feynman, a US quantum physicist and Nobel Prize winner, to describe the "parts" which split from atomic particles duing nuclear collisions. These parts were "bigger" than the original fundamental particles which were split. Such nucleon scattering became part of the "quark" theory, where "partons" are defined by the terms "quark" and "gluon".