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adj. Not native to and not fully established in a new habitat or environment; locally or temporarily naturalized: an adventive weed.

n. An adventive organism.

adj. adventitious

adj. Of a plant that is not native, but was introduced by humans to a place and has since become naturalized.

adj. Accidental.

adj. Adventitious.

n. A thing or person coming from without; an immigrant.

. Accidental; adventitious.

Specifically In botany and zoology, only transient and locally spontaneous, not thoroughly naturalized: applied to introduced plants and animals.

n. One who or that which comes from without; an immigrant.

adj. not native and not fully established; locally or temporarily naturalized

"Unto the first of these, the considerations of the original of the soul, whether it be native or adventive, and how far it is exempted from laws of matter, and of the immortality thereof, and many other points, do appertain: which have been not more laboriously inquired than variously reported; so as the travail therein taken seemeth to have been rather in a maze than in"

strange    foreign   

accidental    adventitious    immigrant