joule

play
noun \ˈjül also ÷ˈjau̇(-ə)l\

Definition of joule

  1. :  a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter

Recent Examples of joule from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'joule'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of joule

James P. Joule


Joule

play
biographical name \ˈjül\

Definition of Joule

  1. James Prescott 1818–1889 English physicist


JOULE Defined for English Language Learners

joule

play
noun

Definition of joule for English Language Learners

  • physics : a unit of work or energy


Medical Dictionary

joule

play
noun \ˈjü(ə)l\

Medical Definition of joule

  1. :  a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter

Biographical Note for joule

Joule

,

James Prescott

(1818–1889), British physicist. Joule is famous for his experiments on heat. In a series of investigations he demonstrated that heat is a form of energy (regardless of the substance that is heated) and later determined quantitatively the amount of mechanical and electrical energy expended in the generation of heat energy. In 1843 he published his value for the amount of work required to produce a unit of heat, now known as the mechanical equivalent of heat. He established the principle that various forms of energy—mechanical, electrical, and heat—are basically the same and are interchangeable. This principle forms the basis of conservation of energy. The joule unit of work or energy was named in his honor in 1882.


Learn More about joule


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to be a fixed element or attribute

Get Word of the Day daily email!

Test Your Vocabulary

July 2017 Words of the Day Quiz

  • alt-597a99e699d07
  • Which is a synonym of gauche?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

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!