Definition

1. Proper noun:
   • Italian physicist and mathematician: Evangelista Torricelli was a 17th-century Italian scientist best known for his invention of the mercury barometer, a device used to measure atmospheric pressure.
   • Historical figure in science: His name is associated with foundational work in fluid dynamics and the study of vacuums, leading to the discovery of atmospheric pressure and the principle of the barometer.

Usage Examples

• Proper noun:
  • Evangelista Torricelli is credited with inventing the barometer in 1643.
  • The experiment conducted by Evangelista Torricelli demonstrated the existence of a vacuum and the weight of air.

Advanced Usage

• "Torricellian vacuum": The vacuum created above the mercury column in a barometer, named after his experiment.
  • The space in a mercury barometer is known as a Torricellian vacuum.
• "Torricelli's law": A theorem in fluid dynamics describing the speed of fluid flowing out of an opening under the force of gravity.
  • Torricelli's law can be used to calculate the efflux velocity from a tank.

Variants and Related Words

• Torricellian (adj): Pertaining to Evangelista Torricelli or his work.
  • The Torricellian experiment was a milestone in physics.
• Barometer (n): The instrument he invented to measure atmospheric pressure.
• Torr (n): A unit of pressure named in his honor, defined as 1/760 of a standard atmosphere.

Synonyms

• Physicist: A scientist who studies physics.
• Inventor: A person who creates a new device or process.

Related Terms and Concepts

• Atmospheric pressure: The pressure exerted by the weight of the atmosphere, which his barometer measured.
• Mercury column: The vertical tube of mercury used in his barometer design.

Noun

1. Italian physicist who invented the mercury barometer (1608-1647)