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associated with something by chance rather than as an integral part; extrinsic.
Botany, Zoology. appearing in an abnormal or unusual position or place, as a root.
Historical Examples

He expresses the unalloyed sensibility of an artist in terms of delicious contemporary life and gives us, adventitiously, romance.
Since Czanne Clive Bell

added or appearing accidentally or unexpectedly
(of a plant or animal part) developing in an abnormal position, as a root that grows from a stem

“of the nature of an addition from without,” c.1600, from Medieval Latin adventitius “coming from abroad, extraneous,” a corruption of Latin adventicius “foreign, strange, accidental,” from advent- past participle stem of advenire “arrive” (see advent). Related: Adventitiously; adventitiousness.

adventitious ad·ven·ti·tious (ād’věn-tĭsh’əs, -vən-)

Arising from an external source or occurring in an unusual place or manner; extrinsic.

Occurring accidentally or spontaneously, not caused by heredity.


ad’ven·ti’tious·ly adv.


Read Also:

  • Adventitious root

    adventitious root adventitious root (ād’věn-tĭsh’əs) A root growing from a location other than the underground, descending portion of the axis of a plant, as from a stem or leaf.

  • Adventive

    not native and usually not yet well established, as exotic plants or animals. an adventive plant or animal. Historical Examples Denmark (Henriksen, 1939): adventive ; origin mostly Jamaica. The Biotic Associations of Cockroaches Louis M. Roth England (Bunting, 1955): adventive, on bananas from Dominica. The Biotic Associations of Cockroaches Louis M. Roth Hormetica laevigata, Wales […]

  • Adventure

    an exciting or very unusual experience. participation in exciting undertakings or enterprises: the spirit of adventure. a bold, usually risky undertaking; hazardous action of uncertain outcome. a commercial or financial speculation of any kind; venture. Obsolete. peril; danger; risk. chance; fortune; luck. to risk or hazard. to take the chance of; dare. to venture to […]

  • Adventure athlete

    noun an athlete who participates strictly in adventure racing

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