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Not native to and not fully established in a new habitat or environment; locally or temporarily naturalized: an adventive weed.
An adventive organism.
[From Latin adventus, arrival; see advent.]
(Biology) (of a species) introduced to a new area and not yet established there; exotic
(Biology) such a plant or animal
1. not native and usu. not yet well established, as exotic plants or animals.n.
2. an adventive plant or animal.
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|Adj.||1.||adventive - not native and not fully established; locally or temporarily naturalized; "an adventive weed"|