Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

darcy

noun
dar·cy | \ˈdärsē\
plural -s

Definition of darcy 

: a unit of porous permeability in physics equal to the permeability of a medium through which the rate of flow of a fluid having one centipoise viscosity under a pressure gradient of one atmosphere per centimeter would be one cubic centimeter per second per square centimeter cross section — compare darcy's law

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!

History and Etymology for darcy

after Henri P.G. Darcy †1858 French hydraulic engineer

Keep scrolling for more

Learn More about darcy

Dictionary Entries near darcy

Darby and Joan

Darbyism

Darbyite

darcy

Darcy's law

Dard

Dardan

Statistics for darcy

Look-up Popularity

Comments on darcy

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

Show Comments  Hide Comments 

WORD OF THE DAY

mawkish

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?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

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!

Words at Play

Ask the Editors

Word Games