adventitiousness

noun
ad·​ven·​ti·​tious·​ness | \ˌad-vən-ˈti-sh(ē-)əs-nəs, -ˌven-\
plural -es

Definition of adventitiousness 

: the quality or state of being adventitious

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First Known Use of adventitiousness

1794, in the meaning defined above

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The first known use of adventitiousness was in 1794

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