sphere etymology

Etymology

The word "sphere" comes from the Latin word "sphaera," which in turn comes from the Greek word "sphaira" (σφαῖρα), meaning "globe" or "ball."

Meaning

A sphere is a three-dimensional shape that is defined by the following properties:

• All points on the surface of the sphere are equidistant from a single point called the center.
• The surface of the sphere is smooth and continuous.
• The interior of the sphere is solid.

Origin

The concept of a sphere has been known for thousands of years. The ancient Greeks were the first to study spheres in depth, and they developed many theorems about their properties. The word "sphere" was first used in English in the 14th century.

Examples

• A basketball is a sphere.
• The Earth is a sphere.
• A bubble is a sphere.

Related Terms

• Hemisphere: Half of a sphere.
• Radius: The distance from the center of a sphere to any point on its surface.
• Diameter: The distance across a sphere through its center.
• Volume: The amount of space inside a sphere.

sphere relate terms

• asthenosphere

  Etymology The term asthenosphere is derived from two Greek words astheno meaning

• asthenia

  Etymology Greek asthenes ἀσθενής meaning weak powerless From the root

• sphere

  Etymology The word sphere comes from the Latin word sphaera which in turn comes from

• atmosphere

  Etymology The word atmosphere is derived from the Ancient Greek words ατμός at

• atmo

  Etymology The word atmo is derived from the Greek word ἀτμός atmos meaning

• sphere

  Etymology The word sphere comes from the Latin word sphaera which in turn comes from

• spherical

  Etymology The word spherical comes from the Greek word sphaira meaning ball or gl

• stratosphere

  Etymology stratosphere comes from the Greek words strato layer and sphaira spher

• tennis

  Etymology The word tennis is derived from the French word tenez which means hold o

• globe

  Etymology The word globe comes from the Latin word globus meaning sphere or ball

• roundness

  Etymology Old English rund round Proto West Germanic rundaz round Proto Germanic

• pole

  Etymology The word pole derives from the following roots Middle English pol Old

• antagonist

  Etymology Greek ἀνταγωνιστής antagonistēs from ἀντί anti agai

• land

  Etymology Old English land Proto Germanic landuz Indo European lendh to li

• prod

  Etymology Latin prodere meaning to betray to expose Old French proder prower me

• drop

  Etymology From Middle English droppe from Old English dropa ddropa drop small porti