Found 2 items, similar to adventive.
English → English (WordNet) Definition: adventive adventive adj : not native and not fully established; locally or temporarily naturalized; “an adventive weed”
English → English (gcide) Definition: Adventive Adventive \Ad*ven"tive\, a. 1. Accidental. [1913 Webster] 2. (Bot.) Adventitious. --Gray. [1913 Webster] Adventive \Ad*ven"tive\, n. A thing or person coming from without; an immigrant. [R.] --Bacon. [1913 Webster]