The quality or state of being adventitious; the condition of occurring accidentally or from an external source rather than being inherent or natural.
From 'adventitious' (Latin 'adventitius,' from outside) plus the suffix '-ness' (forming abstract nouns). Describes the abstract quality of accidental or external origin.
Scientists studying life's complexity often marvel at the 'adventitiousness' of evolution—the fact that random mutations combined with natural selection created the incredible diversity of life we see today is almost miraculous.
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