tailbone

noun tail·bone \ ˈtāl-ˌbōn \
|Updated on: 3 Jun 2018

Definition of tailbone

1 : a caudal vertebra
2 : coccyx

Recent Examples of tailbone from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tailbone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of tailbone

circa 1577

in the meaning defined at sense 1

See Words from the same year
NEW! Time Traveler

TAILBONE Defined for English Language Learners

tailbone

Definition of tailbone for English Language Learners

  • : the small bone at the end of the spine


Medical Dictionary

tailbone

noun tail·bone \ -ˈbōn, -ˌbōn \

medical Definition of tailbone

1 : a caudal vertebra
2 : coccyx

Learn More about tailbone


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

widely and unfavorably known

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
True or False

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

TAKE THE QUIZ
Word Winder's CrossWinder

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!