sorus definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. sori
a cluster of spore cases, esp. the ones on the undersurface of a fern frond
Origin: Modern Latin ; from Classical Greek sōros, a heap: see soma
sorus definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. so·ri
- A cluster of sporangia borne on the underside of a fern frond.
- A reproductive structure in certain fungi and lichens.
Origin: New Latin sōrus, from Greek sōros, heap; see teuə- in Indo-European roots.
sorus - Science Definition
Plural sori sori
- A cluster of sporangia borne on the underside of a fern frond. A sorus is sometimes covered by an indusium. Also called fruitdot.
- A reproductive structure consisting of masses of spores, characteristic of certain fungi such as rusts and smuts.