pronephros

noun
pro·​neph·​ros | \ (ˌ)prō-ˈne-frəs How to pronounce pronephros (audio) , -ˌfräs\

Definition of pronephros

: either member of the first and most anterior pair of the three successive paired vertebrate renal organs that functions in the adults of amphioxus and some lampreys, functions temporarily in larval fishes and amphibians, and is present but nonfunctional in embryos of reptiles, birds, and mammals — compare mesonephros, metanephros

Other Words from pronephros

pronephric \ (ˌ)prō-​ˈne-​frik How to pronounce pronephric (audio) \ adjective

First Known Use of pronephros

1877, in the meaning defined above

History and Etymology for pronephros

New Latin, from Greek pro- + nephros kidney — more at nephritis

Keep scrolling for more

Learn More about pronephros

Dictionary Entries near pronephros

prone

prone float

pronephridiostome

pronephros

proneur

prong

prongbuck

Statistics for pronephros

Look-up Popularity

Time Traveler for pronephros

The first known use of pronephros was in 1877

See more words from the same year

Keep scrolling for more

More Definitions for pronephros

pronephros

noun
pro·​neph·​ros | \ (ˈ)prō-ˈnef-rəs, -ˌräs How to pronounce pronephros (audio) \
plural pronephroi\ -​ˌrȯi How to pronounce pronephroi (audio) \

Medical Definition of pronephros

: either member of the first and most anterior pair of the three paired vertebrate renal organs that functions in the adults of amphioxus and some lampreys, functions temporarily in larval fishes and amphibians, and is present but nonfunctional in embryos of reptiles, birds, and mammals — compare mesonephros, metanephros

More from Merriam-Webster on pronephros

Britannica.com: Encyclopedia article about pronephros

Comments on pronephros

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

WORD OF THE DAY

to speak slightingly about or to degrade

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

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!