Belonging to or characteristic of something that is chronologically out of place or from a different time period.
From anachronism (Greek 'ana-' back, against + 'chronos' time) plus the suffix '-matical' (variant of '-matic'), creating an archaic or emphatic form of anachronistic.
The phrase 'anachronismatical' is itself somewhat anachronistic—it's a fussy old-fashioned way of saying what modern English just calls 'anachronistic,' showing how language itself evolves!
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