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Re:Show HN: A library to record and intercept JavaScript at ... by leeoniya on Saturday September 09, 2017 @11:52AM (#15207619)
as with a lot of js terminology, it's been re-appropirated:

http://mrale.ph/blog/2015/01/11/whats-up-with-monomorphism.h...

also, polyfill (hip) === shim (no longer hip)

Re:Show HN: A library to record and intercept JavaScript at ... by nickfargo on Saturday September 09, 2017 @12:12PM (#15207706)
The term is not merely a recent appropriation. Parametric polymorphism is a concept from functional programming and formal type theory, with application far beyond just JavaScript.
Re:Show HN: A library to record and intercept JavaScript at ... by leeoniya on Saturday September 09, 2017 @12:14PM (#15207711)
tbh, polymorphism makes more sense to me in the parametric definition [in the context of weak types/signatures] than in the standard oop def.