pygidium

noun
py·​gid·​i·​um | \pī-ˈji-dē-əm \
plural pygidia\ pī-​ˈji-​dē-​ə \

Definition of pygidium 

: a caudal structure or the terminal body region of various invertebrates

Keep scrolling for more

Other Words from pygidium

pygidial \ pī-​ˈji-​dē-​əl \ adjective

Examples of pygidium in a Sentence

Recent Examples on the Web

The trilobite spans 146 meters from cephalon to pygidium, or head to tail, and is carved into the shape of a spiny Ceraurus trilobite instead of the plainer state fossil, Calymene. Giorgia Guglielmi, Science | AAAS, "Top stories: Semen-dwelling viruses, password-guessing AI, and a trilobite-shaped corn maze," 22 Sep. 2017

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

First Known Use of pygidium

1848, in the meaning defined above

History and Etymology for pygidium

New Latin, from Greek pygidion, diminutive of pygē rump

Keep scrolling for more

Learn More about pygidium

Dictionary Entries near pygidium

pygal

pygarg

Pygidiidae

pygidium

pygmaean

Pygmalion

pygmoid

Statistics for pygidium

Look-up Popularity

Time Traveler for pygidium

The first known use of pygidium was in 1848

See more words from the same year

Comments on pygidium

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

WORD OF THE DAY

to express warning or disapproval

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
Spell It

Can you spell these 10 commonly misspelled words?

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!