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adventitious

[ ad-vuhn-tish-uhs ]
/ ˌæd vənˈtɪʃ əs /
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adjective

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.

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Origin of adventitious

1595–1605; <Latin adventīcius literally, coming from without, external, equivalent to ad-ad- + ven- (stem of venīre to come) + -t(us) past participle suffix + -īcius-itious
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for adventitious

adventitious
/ (ˌædvɛnˈtɪʃəs) /

adjective

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
adventitiously, adverb
C17: from Latin adventīcius coming from outside, from adventus a coming
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for adventitious

adventitious
[ ăd′vĕn-tĭshəs ]

adj.

Arising from an external source or occurring in an unusual place or manner; extrinsic.
Occurring accidentally or spontaneously, not caused by heredity.
Adventitial.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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