adjective. Arising from an external cause or factor; not inherent.

adjective. Of or belonging to a structure that develops in an unusual place.

In phytogeography, naturalized from a distant formation: opposed to *vicine. A term proposed by Pound and Clements. Compare adventitious, 2.

Added extrinsically; not springing from the essence of the subject, but from another source; foreign; accidentally or casually acquired: applied to that which does not properly belong to a subject, but which is superadded or adopted, as in a picture or other work of art, to give it additional power or effect.

In botany and zoology, appearing casually, or in an abnormal or unusual position or place; occurring as a straggler or away from its natural position or habitation; adventive.

In anatomy, of the nature of adventitia: as, the adventitious coat of an artery.

adjective. Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign.

adjective. Out of the proper or usual place.

adjective. Accidentally or sparingly spontaneous in a country or district; not fully naturalized; adventive; -- applied to foreign plants.

adjective. Acquired, as diseases; accidental.

adjective. From an external source; not innate or inherent, foreign.

adjective. Accidental, additional, appearing casually.

adjective. Not congenital; acquired.

adjective. Developing in an unusual place or from an unusual source.

adjective. associated by chance and not an integral part

"Cuttings are plant pieces, usually stems or branches, capable of growing new roots, called adventitious roots."

extrinsic  

accidental  apoptotic  coincidental  contributory  divisible  

accessory  accessory  accidental  accidental  acquired