Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

perisperm

noun
peri·sperm | \ ˈperəˌspərm \

Definition of perisperm 

1 : nutritive tissue of a seed derived from the nucellus and deposited external to the embryo sac —distinguished from endosperm

2 : nutritive tissue of a seed that includes both endosperm and perisperm —not used technically

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Other words from perisperm

perispermal \¦⸗⸗¦spərməl \ or perispermic \-mik \ adjective

History and Etymology for perisperm

French périsperme, from péri- peri- + -sperme -sperm

Keep scrolling for more

Learn More about perisperm

Dictionary Entries near perisperm

perish the thought

perisomal

perisome

perisperm

Perisphinctes

perispomenon

perispore

Statistics for perisperm

Look-up Popularity

Comments on perisperm

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

Show Comments  Hide Comments 

WORD OF THE DAY

biannual

occurring twice a year or every two years

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

  • alt-573b465788319
  • Name these cookies!
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

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!

Words at Play

Ask the Editors

Word Games