adventive

/ædˈvɛntɪv/
adjective
  1. Describing a plant or animal that has arrived in a new area but is not fully established as native.
    • The adventive species of beetle was first spotted near the port.
    • Botanists are monitoring adventive plants that may become invasive.
    • Some adventive birds have adapted well to urban environments.
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Antonyms
noun
  1. A plant or animal that has arrived in a new area but is not yet fully established.
    • The garden had several adventives that likely arrived in imported soil.
    • Researchers cataloged each adventive found along the riverbank.
    • An adventive can sometimes become a permanent resident of the ecosystem.
What does "adventive" mean? | whatsthatwordmean | whatsthatwordmean