An archaic or dialect variant relating to the right or act of advowson; the medieval church privilege of presenting clergy.
From advowson + -ance (a state or act suffix). This variant form of advowry or related to advowson appears in medieval records. The -ance ending comes from Latin -antia and creates abstract nouns.
Advowsance is so obscure that even historians need to check their references—it's like a linguistic artifact buried in medieval documents, preserved but no longer actively used even by specialists.
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