Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

endostome

noun
en·do·stome | \ˈendəˌstōm\
plural -s

Definition of endostome 

1a : the opening in the inner integument of an ovule having two integuments

b : the inner part of the peristome of a moss

2 [ New Latin endostoma ] : endostoma

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!

History and Etymology for endostome

International Scientific Vocabulary end- + -stome; probably originally formed in French

Keep scrolling for more

Learn More about endostome

Dictionary Entries near endostome

endosternite

endosteum

endostoma

endostome

endostosis

endostracal

endostracum

Statistics for endostome

Look-up Popularity

Comments on endostome

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

Show Comments  Hide Comments 

WORD OF THE DAY

superjacent

lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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