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sorus

[ sawr-uhs, sohr- ]

noun

, plural so·ri [sawr, -ahy, sohr, -ahy].
  1. Botany. one of the clusters of sporangia on the back of the fronds of ferns.
  2. Mycology. a soruslike spore mass of certain fungi and lichens.


sorus

/ ˈsɔːrəs /

noun

  1. a cluster of sporangia on the undersurface of certain fern leaves
  2. any of various similar spore-producing structures in some lichens and fungi
“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


sorus

/ sôrəs /

, Plural sori sôrī

  1. A cluster of sporangia borne on the underside of a fern frond. A sorus is sometimes covered by an indusium.
  2. Also called fruitdot
  3. A reproductive structure consisting of masses of spores, characteristic of certain fungi such as rusts and smuts.


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Word History and Origins

Origin of sorus1

1825–35; < New Latin < Greek sōrós heap
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Word History and Origins

Origin of sorus1

C19: via New Latin from Greek sōros a heap
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Example Sentences

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.

Synangium, si-nan′ji-um, n. an arterial trunk: the boat-shaped sorus of certain ferns.

Commonly the spore-cases occupy only detached spots or lines, each of which is called a Sorus, or in English merely a Fruit-dot.

In this case the sorus is always near to the margin of the leaf, and the indusium or covering is cup-shaped.

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