n., pl., so·ri (sôr'ī, sōr'ī).
- A cluster of sporangia borne on the underside of a fern frond.
- A reproductive structure in certain fungi and lichens.
[New Latin sōrus, from Greek sōros, heap.]
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.
