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• darcy
  darcy

  noun

  a unit of permeability, representing the flow, at 1 atmosphere, of 1 cubic centimeter of fluid with 1 centipoise viscosity in 1 second through a 1-square-centimeter cross section of porous medium 1 centimeter long.
• Darcy
  Darcy

  noun

  a male given name.
• Darcy,
  Darcy,

  French engineer who formulated the law (now named for him) governing the rate at which a fluid flows through a permeable medium. The darcy unit, used to measure the permeability of porous substances, is also named after him.

darcy

¹ American  

[dahr-see] / ˈdɑr si /

noun

• darcies
  plural

1. Physics. a unit of permeability, representing the flow, at 1 atmosphere, of 1 cubic centimeter of fluid with 1 centipoise viscosity in 1 second through a 1-square-centimeter cross section of porous medium 1 centimeter long.

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Darcy ² American  

[dahr-see] / ˈdɑr si /

noun

1. a male given name.

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Darcy ¹ British  

/ ˈdɑːsɪ /

noun

1. ( James ) Les ( lie ). 1895–1917, Australian boxer and folk hero, who lost only five professional fights and was never knocked out, considered a martyr after his death from septicaemia during a tour of the United States

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darcy ² British  

/ ˈdɑːsɪ /

noun

1. D. geology a unit expressing the permeability coefficient of rock

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Darcy, ¹ Scientific  

1. French engineer who formulated the law (now named for him) governing the rate at which a fluid flows through a permeable medium. The darcy unit, used to measure the permeability of porous substances, is also named after him.

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darcy ² Scientific  

/ där′sē′ /

1. A unit used to measure the permeability of porous substances such as soil. One darcy is equal to the passage of 1 cubic centimeter of fluid having a viscosity of 1 centipoise for 1 second under the pressure of 1 atmosphere through a medium having a volume of 1 cubic centimeter.

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Other Word Forms

Noun Inflected Forms

• darcies
  plural

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Etymology

Origin of darcy

After Henri-Philibert-Gaspard Darcy (1803–58), French engineer

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Example Sentences

See Examples For:

darcy Darcy Darcy,

Olly: jesus. is there a girl on this planet who doesn't love mr. darcy Madeline: All girls love Mr. Darcy?

From "Everything, Everything" by Nicola Yoon

Olly: are you kidding? even my sister loves darcy and she doesn't love anybody.

From "Everything, Everything" by Nicola Yoon

Guest: Oliver Darcy, founder and lead author of Status News.

From Slate ● Sep. 24, 2026

During that interview, Nicola Bannon and Lynne Darcy said they found it difficult to deal with the character references that had been given to the court before their attacker was sentenced.

From BBC ● Aug. 5, 2026

The distinctive jazz vocalist teams with the Metropole Orkest and arranger Darcy James Argue on an album of expressively rendered ballads.

From The Wall Street Journal ● Jul. 13, 2026

Mr. Darcy would never . . . and that’s the point.

From Salon ● Jun. 25, 2026

Darcy, after enquiring of her how Mr. and Mrs. Gardiner did, a question which she could not answer without confusion, said scarcely anything.

From "Pride and Prejudice" by Jane Austen

Guest: Oliver Darcy, founder and lead author of Status News.

From Slate ● Sep. 24, 2026

The distinctive jazz vocalist teams with the Metropole Orkest and arranger Darcy James Argue on an album of expressively rendered ballads.

From The Wall Street Journal ● Jul. 13, 2026

Mr. Darcy would never . . . and that’s the point.

From Salon ● Jun. 25, 2026

Once again, Mr. Darcy must do what he can to protect the dreaded Wickham, and in doing so all manner of secrets are revealed.

From Los Angeles Times ● Jun. 8, 2026

But Mr. Gardiner could not be seen, and Mr. Darcy found, on further enquiry, that your father was still with him, but would quit town the next morning.

From "Pride and Prejudice" by Jane Austen

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