Groups comparison

Anachronic[anachronism] - 1992 to 2018
Objects, technology, or expressions appearing in regular use much after they were phased out or much before they were introduced or invented.

Prochronic[prochronism] - 1992 to 1999
Items, expressions, ideas, etc. appearing in a time before they were invented and thus could not have been there.

Parachronic(Metachronic)[Parachronism;Metachronism] - 2003 to 2019
Objects, technology, or expressions appearing in regular use much after they were phased out.

anachronic
prochronic
parachronic
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