Relating to or concerning an edict; of or pertaining to an official proclamation or order.
From edict (from Latin edictum, meaning 'something proclaimed') plus the suffix -al (meaning 'relating to'). This is an extremely rare adjective used primarily in historical legal contexts.
Edital is so obscure that you'll rarely see it even in historical documents—scholars usually just say 'concerning edicts' rather than 'edital matters,' showing how even grammatically perfect words can fail to survive if simpler alternatives exist.
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