sorus

noun
so·​rus | \ ˈsȯr-əs How to pronounce sorus (audio) \
plural sori\ ˈsȯr-​ˌī How to pronounce sorus (audio) , -​ˌē \

Definition of sorus

: a cluster of plant reproductive bodies: such as
a : a cluster of sporangia on the underside of a fertile fern frond
b : a mass of spores bursting through the epidermis of the host plant of a parasitic fungus
c : a cluster of gemmae on the thallus of a lichen

First Known Use of sorus

1832, in the meaning defined above

History and Etymology for sorus

New Latin, from Greek sōros heap

Keep scrolling for more

Learn More about sorus

Time Traveler for sorus

Time Traveler

The first known use of sorus was in 1832

See more words from the same year

Statistics for sorus

Cite this Entry

“Sorus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sorus. Accessed 22 Jan. 2021.

More from Merriam-Webster on sorus

Britannica.com: Encyclopedia article about sorus

Comments on sorus

What made you want to look up sorus? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!