apatosaurus

noun
apato·​sau·​rus | \ə-ˌpa-tə-ˈsȯr-əs \
variants: or less commonly apatosaur

Definition of apatosaurus 

: any of a genus (Apatosaurus of the family Diplodocidae) of very large, herbivorous, sauropod dinosaurs that lived during the Late Jurassic period and reached a length of over 65 feet (20 meters) and a height of 12 feet (3.7 meters) and are thought to have attained a weight of up to 30 tons (27 metric tons)

Note: Apatosauruses were first identified as being of a separate genus (Brontosaurus) and continue to be commonly called brontosauruses or brontosaurs based on this earlier and now invalid classification.

Examples of apatosaurus in a Sentence

Recent Examples on the Web

The resulting film is a sixth-grade sketchbook mash of dino-murder, cartoonish villains, and plot holes big enough for an apatosaurus to fit through. Sam Machkovech, Ars Technica, "Jurassic World: Fallen Kingdom review: This nonsense has gone full Sharknado," 22 June 2018 There were stegosauruses, apatosauruses, a T-rex, but the parasaurolophus, in all its weird glory, was always my favorite. Katherine Clover, The Cut, "The Silly Tattoo That Got Me Through My Worst Breakup," 15 Feb. 2018 Kids can also meet a baby apatosaurus, take an exciting spin in the Jurassic Jeeps and play in themed bounce houses, dig for fossils, do crafts, enjoy face-painting and more. Oc Disney Staff, Orange County Register, "15 things to do this weekend in Orange County (March 31-April 2)," 1 Apr. 2017

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

See More

First Known Use of apatosaurus

1878, in the meaning defined above

History and Etymology for apatosaurus

New Latin, from Greek apatē + sauros lizard

Keep scrolling for more

Learn More about apatosaurus

Share apatosaurus

Dictionary Entries near apatosaurus

apatite

a pat on the back

Apatornis

apatosaurus

apaumé

Apayao

APB

Statistics for apatosaurus

Look-up Popularity

Time Traveler for apatosaurus

The first known use of apatosaurus was in 1878

See more words from the same year

Keep scrolling for more

More Definitions for apatosaurus

apatosaurus

noun
apato·​sau·​rus | \ə-ˌpa-tə-ˈsȯr-əs \

Kids Definition of apatosaurus

More from Merriam-Webster on apatosaurus

See words that rhyme with apatosaurus

Britannica.com: Encyclopedia article about apatosaurus

Comments on apatosaurus

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

WORD OF THE DAY

noxious or harmful

Get Word of the Day daily email!

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a-traditional-thanksgiving-dinner
  • November comes from a word for which of the following numbers?
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!