[sawr-uh s, sohr-]
- Botany. one of the clusters of sporangia on the back of the fronds of ferns.
- Mycology. a soruslike spore mass of certain fungi and lichens.
Origin of sorus
1825–35; < New Latin < Greek sōrós heap
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sorus
The indusium arises from a vein to which the sorus is attached.
The sorus is circular and is covered with an indusium which is notched or kidney-shaped.
The proper (often shield-shaped) covering of the sorus or fruit-dot in Ferns.
Indusium hood-shaped, fixed centrally behind the sorus and arching over it, soon withering, often illusive.
Indusium star-shaped, of a few irregular segments fixed beneath the sorus, often obscure.
- a cluster of sporangia on the undersurface of certain fern leaves
- any of various similar spore-producing structures in some lichens and fungi
C19: via New Latin from Greek sōros a heap
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
- 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.
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