dewar

• اسم يُطلق على وعاء معزول بالتفريغ يُستخدم لحفظ الغازات المسالة مثل الهواء السائل أو الهيليوم في التجارب العلمية، سُمّي على اسم مخترعه الكيميائي والفيزيائي الإسكتلندي السير جيمس ديوار.

A proper noun referring to a vacuum flask designed to hold liquefied gases such as liquid air or helium for scientific experiments, named after its inventor, the Scottish chemist and physicist Sir James Dewar.

غير معدود · اسم علم

1. Vacuum flask for cryogenicsC1formalscientific

   A double-walled container with a vacuum between the walls, used to store extremely cold liquids like liquid air or helium for scientific experiments.

   وعاء ديوار

   • The laboratory uses a Dewar to store liquid nitrogen for the experiment.
   • He carefully transferred the liquid helium into the Dewar flask.
   • The Dewar maintained the cryogenic temperature for several hours.

   المرادفاتdewar flaskvacuum bottlevacuum flask

2. C2formalbritish

   Sir James Dewar (1842–1923), a Scottish chemist and physicist known for his pioneering work in cryogenics and for inventing the vacuum flask that bears his name.

   جيمس ديوار

   • Dewar's research on low-temperature physics was groundbreaking.
   • The Dewar flask was invented by Sir James Dewar in 1892.
   • Many of Dewar's contributions to cryogenics are still used today.