Pronunciation: [sfˈi͡ə] (IPA) 
The word "sphere" is spelled with the letters s-p-h-e-r-e. Its IPA phonetic transcription is /sfɪər/. The first sound is an unvoiced "s" followed by the "f" sound which is also unvoiced. The "ɪ" represents a short "i" sound. The "ər" at the end of the word is pronounced like "er" in "better". This word is commonly used in mathematics and refers to a three-dimensional object that is perfectly round in shape.
A sphere is a three-dimensional geometric shape that is perfectly round, symmetrical, and smooth. It is defined as a set of points in space that are equidistant from a fixed center point. All points on the surface of a sphere are at the same radial distance from its center, which is why it has no corners or edges.
Mathematically, a sphere can be defined using its radius, which is the distance from its center to any point on its surface. The surface of a sphere is composed of an infinite number of points, forming a continuous curve. The total space within the sphere is called its volume, which can be calculated using the formula V = (4/3)πr³, where V represents the volume and r represents the radius.
Spheres are widely present in nature, such as celestial bodies like planets and stars. In physics, the term "sphere" is also used to represent a theoretical concept where objects have spherical symmetry. Besides, the term "sphere" can be metaphorically used to describe a particular field or area of activity, expertise, or influence. For instance, an individual who is knowledgeable in a specialized subject may be referred to as an expert or authority in that sphere.
A ball or globular body.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The vast concave or expanse of the heavens; a globe; a celestial orb; any round solid body; employment; rank; circuit of action, knowledge, or influence.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
The word sphere has its origins in the Greek language. It is derived from the Greek word sphaira, which means a ball or globe. The term was later borrowed and adapted into Latin as sphaera, and eventually entered the English language as sphere.
