plural noun
Al·​li·​ga·​tor·​i·​dae | \ ˌalə̇gəˈtȯrəˌdē \

Definition of Alligatoridae

in some classifications
: a family of crocodilians comprising the alligators and the caimans

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!

First Known Use of Alligatoridae

1855, in the meaning defined above

History and Etymology for Alligatoridae

New Latin, from Alligator, type genus + -idae

Keep scrolling for more

Learn More about Alligatoridae

Time Traveler for Alligatoridae

Time Traveler

The first known use of Alligatoridae was in 1855

See more words from the same year

Statistics for Alligatoridae

Cite this Entry

“Alligatoridae.” Dictionary, Merriam-Webster, Accessed 14 Aug. 2020.

Comments on Alligatoridae

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


Test Your Vocabulary

Name That Thing: Animal Edition

  • alt 5a023732e6f75
  • Name that animal:
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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