gill slit

noun

Definition of gill slit 

1 : any of the openings or clefts between the gill arches in vertebrates that breathe by gills through which water taken in at the mouth passes to the exterior and so bathes the gills

2 : any of the rudimentary grooves in the neck region of the embryos of air-breathing vertebrates that correspond to the gill slits

3 : the external opening to the cavity containing the gills when a protective covering of the gills is present

First Known Use of gill slit

1854, in the meaning defined at sense 1

Keep scrolling for more

Learn More about gill slit

Statistics for gill slit

Look-up Popularity

Time Traveler for gill slit

The first known use of gill slit was in 1854

See more words from the same year

Keep scrolling for more

More Definitions for gill slit

gill slit

noun

Medical Definition of gill slit 

: one of the openings or clefts between the gill arches in vertebrates that breathe by gills through which water taken in at the mouth passes to the exterior and bathes the gills also : branchial cleft

More from Merriam-Webster on gill slit

See words that rhyme with gill slit

Britannica.com: Encyclopedia article about gill slit

Comments on gill slit

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

WORD OF THE DAY

exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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!