Archaic or rare term meaning the act of tearing away or separation; possibly related to divulsion or avulsion.
From Latin avellere (to tear away) or ad- + visio. The term is obsolete and rarely appears even in historical texts.
This word is so rare that it mostly survives in unabridged dictionaries as a curiosity—it's the kind of word that medieval scholars might have used but which simply never made it into everyday English.
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