Definitions for "Adventitious"
Keywords:  unusual, bud, shoot, zygote, root
Out of the proper or usual place; as, adventitious buds or roots.
buds or roots that develop in unusual areas. Many wetland plants exhibit adventitious roots.
Description of structures that are abnormal in their position of formation (e.g. roots forming from stems). Organs that take advantage of opportunities for development.
Added extrinsically; not essentially inherent; accidental or causal; additional; supervenient; foreign.
Accidentally or sparingly spontaneous in a country or district; not fully naturalized; adventive; -- applied to foreign plants.
Acquired, as diseases; accidental.
Keywords:  encarta
Keywords:  impermanent, arrived
Recently arrived, possibly impermanent
a. (L. adventitius, extraneous) plant structures or tissue occurring in an abnormal positon.