In botany and ecology, referring to a plant or organism that is accidentally introduced to an area but is not fully naturalized or established as native.
From 'advent' (arrival) plus the suffix '-ive.' Used in biological sciences to describe non-native species that arrived without intentional human introduction.
Adventive species are ecological wildcards—they arrived by accident (maybe in ship ballast or on a traveler's shoe) but they're thriving, and sometimes they become invasive and outcompete native plants!
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