Relating to an academy or the academic world; characteristic of scholars or academic institutions.
From academy plus the Latin-derived suffix -ial (from -ialis), which creates adjectives meaning 'relating to' or 'pertaining to.' This is a formal, somewhat archaic variant of the more common 'academic.'
English loves multiple suffixes that do almost the same job—we have academic, academical, and academial, each slightly different in formality and use, showing how our language accumulates layers of precision over centuries.
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