Relating to or characteristic of an adit; pertaining to a mine entrance or horizontal tunnel.
From adit + -al (suffix forming adjectives meaning 'of or relating to'). This technical term follows standard English adjective formation patterns applied to mining terminology.
When geologists describe an 'adital opening,' they're using a word that connects modern mining science directly back to Roman engineering terminology—proof that some technical language persists unchanged for nearly 2,000 years.
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