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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.]

ad·ven′tive·ly adv.


(ədˈvɛntɪv) biology
(Biology) (of a species) introduced to a new area and not yet established there; exotic
(Biology) such a plant or animal
Abbreviation: casual


(ædˈvɛn tɪv)
1. not native and usu. not yet well established, as exotic plants or animals.
2. an adventive plant or animal.
ad•ven′tive•ly, adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.adventive - not native and not fully establishedadventive - not native and not fully established; locally or temporarily naturalized; "an adventive weed"
foreign, strange - relating to or originating in or characteristic of another place or part of the world; "foreign nations"; "a foreign accent"; "on business in a foreign city"
References in periodicals archive ?
perseae infestations is also a concern in other avocado growing countries where adventive populations of this spider mite have successfully established, including Costa Rica (1978), the United States (California) (1990), Israel (2001), Spain (2004), Portugal (2005), and Italy (2014) (Lara & Hoddle 2015a; Zappala et al.
As examples, paved surfaces (concrete, asphalt) directly remove habitat needed by ground-nesting bees and other insects; asphalt roads can induce misorientation of aquatic insects to polarised light, leading to futile oviposition on road surfaces; traffic can cause direct mortality; roadways may act as a barrier, isolating insect populations; light intensity in streets and buildings can attract phototactic insects from more natural areas and render them vulnerable to vertebrate predators; and 'heat islands' may affect development rates and tolerances of resident and adventive species.
complanatus is an adventive, or nonindigenous, species whose presence has been documented in Northern and Southern California (Frank and McCoy 1995; SBNHM 2014; Sokolov and Kavanaugh 2014).
not because we necessarily wish to take up residence in their fields, villages or cities, or so that we may become friends, but in order that we may live in a more wakeful, mindful and composed way in the adventive present of a world we are actually making.
For physiognomy, Nt = native, Ad = adventive or non-native, P = perennial, A = annual, B = biennial, H = herbaceous, W = woody.
However, such method would be a prospective one only for the usage in local conditions of specific territories, whilst requiring control of possible occurrence and spontaneous disseminations of adventive and even quarantine species of plants in these conditions.
Adventive fraction of flora includes six species out of six genera and six families, accounting for 4.
Without Say's supply, that is without the adventive goods and services that inspire consumers anew, demand that has declined will remain sluggish.
It is also very common as an adventive in pastures and wayside thickets throughout the tropics and subtropics.