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adventitious

[ad-vuh n-tish-uh s] /ˌæd vənˈtɪʃ əs/
adjective
1.
associated with something by chance rather than as an integral part; extrinsic.
2.
Botany, Zoology. appearing in an abnormal or unusual position or place, as a root.
Origin
1595-1605
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
Related forms
adventitiously, adverb
adventitiousness, noun
nonadventitious, adjective
nonadventitiously, adverb
nonadventitiousness, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for adventitiously

adventitious

/ˌædvɛnˈtɪʃəs/
adjective
1.
added or appearing accidentally or unexpectedly
2.
(of a plant or animal part) developing in an abnormal position, as a root that grows from a stem
Derived Forms
adventitiously, adverb
Word Origin
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
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Word Origin and History for adventitiously

adventitious

adj.

"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.

Online Etymology Dictionary, © 2010 Douglas Harper
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adventitiously in Medicine

adventitious ad·ven·ti·tious (ād'věn-tĭsh'əs, -vən-)
adj.

  1. Arising from an external source or occurring in an unusual place or manner; extrinsic.

  2. Occurring accidentally or spontaneously, not caused by heredity.

  3. Adventitial.


ad'ven·ti'tious·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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