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1. Arising from an external cause or factor; not inherent: symmetry that was purely adventitious; adventitious circumstances that contributed to the plan's success.
a. Of or belonging to a structure that develops in an unusual place: adventitious roots.
b. Originating from an external source, especially as a contaminant: adventitious viruses in a cell culture.
c. Not congenital: adventitious deafness.
[From Latin adventīcius, foreign, from adventus, arrival; see advent.]
1. added or appearing accidentally or unexpectedly
2. (Botany) (of a plant or animal part) developing in an abnormal position, as a root that grows from a stem
[C17: from Latin adventīcius coming from outside, from adventus a coming]
ad•ven•ti•tious(ˌæd vənˈtɪʃ əs)
1. associated by chance and not as an integral part; extrinsic.
2. appearing in an unusual or abnormal place, as a root on a stem.
[1595–1605; < Latin adventīcius literally, coming from without =advent(us), past participle of advenīre (see advent) + -īcius -itious]
Growth produced where it does not normally occur. For example, roots or buds produced along stems.
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|Adj.||1.||adventitious - associated by chance and not an integral part; "poetry is something to which words are the accidental, not by any means the essential form"- Frederick W. Robertson; "they had to decide whether his misconduct was adventitious or the result of a flaw in his character"|
extrinsic - not forming an essential part of a thing or arising or originating from the outside; "extrinsic evidence"; "an extrinsic feature of the new building"; "that style is something extrinsic to the subject"; "looking for extrinsic aid"