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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.

ad·ven′tive·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


Ecology Referring to an organism which is not native to an ecosystem.
Psychology Referring to a unique facet or anomaly in one's life history which did not follow the usual “trajectory”.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
Finally, natural and unpredictable fluctuations in the number of occasional and adventive species may also be a cause of certain deviations in faunistic lists of the community.
New records of adventive Carabidae (Coleoptera) found in California.
Adventive intends to publish trends and statistical information in a report that will be available on their website in November 2013.
List of the assessed adventive Leguminous, origin, usage, climatic affinity, number of states and municipalities where the species has been recorded, date for first herbarium record and growth habit.
Additional records of adventives Onthophagus Latreille (Coleoptera: Scarabaeidae) in North America.
This species is currently treated as a non-indigenous adventive on the island (Woischke 2010).
Stricta, an adventive plant in New Zealand, can yield plants capable of flowering and setting viable seeds.
The word Bacon used was 'adventive', which, in 17th century orthography, was written 'adventure', and it seems that in one edition of Bacon's work, the penultimate letter of that word was placed upside down by the typesetter, producing 'adventine'.
Aegilops caudata occurs primarily in the southern Balkans (Greece, Bulgaria, Croatia) and is adventive (introduced, but not fully naturalized) in the South of France.
For the investigations on the vertical and radial frequency, extent, and quality of adventive knots (compared with whorl knots), 1-in logs were cut at 3 heights from 20 trees from 4 selected stands.
Kaul (1986) observed that the flora was also adventive in origin with nearly all of the species having colonized from elsewhere, especially from the southwest and southeast.