Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

endosiphuncle

noun
en·do·siphuncle | \"+\

Definition of endosiphuncle 

: an inner tube in the calcareous siphuncle of certain fossil cephalopods

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 endosiphuncle

end- + siphuncle

Keep scrolling for more

Learn More about endosiphuncle

Share endosiphuncle

Resources for endosiphuncle

Cite Time Traveler Time Traveler! Explore the year a word first appeared

Dictionary Entries near endosiphuncle

endoscopic

endosepsis

endosiphon

endosiphuncle

endoskeleton

endosome

endosperm

Statistics for endosiphuncle

Look-up Popularity

Comments on endosiphuncle

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

Show Comments  Hide Comments 

WORD OF THE DAY

acceptation

a generally accepted meaning of a word

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

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