adj.
- Not inherent but added extrinsically. See synonyms at accidental.
- Biology. Of or belonging to a structure that develops in an unusual place: adventitious roots.
[From Latin adventīcius, foreign, from adventus, arrival. See advent.]
adventitiously ad'ven·ti'tious·ly adv.adventitiousness ad'ven·ti'tious·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
