- 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.
- 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.
- Arising from an external source or occurring in an unusual place or manner; extrinsic.
- Occurring accidentally or spontaneously, not caused by heredity.