Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: moonfish sense a
: a sea horse (genus Hippocampus)
: a dusky rough-skinned southern African scorpaenid fish (Congiopodus torvus)
: horseshoe crab
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:
Resources for horsefish
Comments on horsefish
What made you want to look up horsefish? Please tell us where you read or heard it (including the quote, if possible).
a nest or breeding place
Get Word of the Day daily email!
Late Autumn 2018 Words of the Day Quiz
Test your vocabulary with our 10-question quiz!
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Words from the week of 12/14/2018
Yeggs, jackrollers, footpads, and more
Stuck in the middle with usage
Focusing in on what we do best
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
More word puzzles to rack your brain
SCRABBLE® fans, sharpen your skills!