sphere
86
2.8
- noun
- /sfɪr/
- The operators looked out and saw a huge, fiery orange sphere.
- radius of a sphere
- surface of a sphere
- cube or a sphere
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Watch on YouTubeIt's how many lead spheres of that size make a pound.
- It's how many lead spheres of that size make a pound.
- Stars are hot, gaseous spheres, and they also move up and down.
Examples
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What is the formula for the volume of a sphere?
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Imagine a sphere of metal, vast as the sun.
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We're talking about the area of a sphere as we go out, right?
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All right, so a zero sphere is just two points.
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The Earth is a sphere.
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The volume of the sphere is proportional to R cubed.
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It's a perfect sphere.
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The soccer ball is a perfect sphere with all sides equally distant from the center.
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In geometry class, we learned that a sphere is defined as a round three-dimensional shape.
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The artist created a beautiful glass sphere that reflected light in all directions.
Synonyms
Compounds
5
6.8
A region where a foreign country has strong political or economic control without formal rule
4
6.2
The area where a person or group can affect decisions even without official power
- Specialized
1
8.4
An imaginary ball around the Earth in the sky where stars and planets appear to be
- Specialized
1
9.9
A model of the sky made of rings that shows how stars and planets move
How Round
Surface Forms
Etymology
Sphere comes from the Greek word sphaira, which means 'ball', so you can think of a sphere as a perfectly round 3D ball like a soap bubble or a globe.