Share this entry

sorus Syllabification: so·rus
Pronunciation: /ˈsôrəs/

Definition of sorus in English:

noun (plural soriˈsôrī)

1A cluster of spore-producing receptacles on the underside of a fern frond.
Example sentences
  • In fertile plants, sori are produced on the abaxial side of the leaves in summer.
  • At flowering, the fungus undergoes massive sporulation in the floral tissue and replaces the seeds with smut sori.
  • They are commonly referred to as the Lip Ferns because the sori are borne at the margins of the pinnules and the leaf margins themselves are often reflexed to form false indusia that protect the sori.
1.1A gamete-producing or fruiting body in certain algae and fungi.


Mid 19th century: modern Latin, from Greek sōros 'heap'.

Words that rhyme with sorus

brachiosaurus, brontosaurus, canorous, chorus, Epidaurus, giganotosaurus, Horus, megalosaurus, pelorus, porous, stegosaurus, Taurus, thesaurus, torus, tyrannosaurus

Definition of sorus in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day coiffeur
Pronunciation: kwɑːˈfəː
a hairdresser