You searched for: “sphere
sphere (s) (nouns), spheres (pl)
1. An object similar in shape to a ball.
2. In mathematics, a three-dimensional closed surface consisting of all points that are at a given distance from a center.
3. A solid figure bounded by a sphere, or the volume it encloses.
4. A field of knowledge, interest, or activity.
5. An area of control or influence: "The student took no interest in matters beyond her sphere of knowledge."
6. A level or group within a society or a particular social world, stratum of society, or walk of life: "His social sphere was very limited."
7. An astronomical object; such as, a planet, moon, or star.
8. In early astronomical theory, a revolving concentric transparent shell on which the sun, moon, planets, and stars were thought to be fixed as they moved around the earth.
9. The sky, appearing as a hemisphere to an observer; for example, the sphere of the heavens.
10. Etymology: from Greek σφαῖρα, sphaira, "globe, ball" or a perfectly round geometrical object in three-dimensional space; such as, the shape of a round ball.
This entry is located in the following unit: sphero-, spher-, -sphere- (page 11)
sphere (verb), spheres; sphered; sphering
1. To form into a round shape.
2. To put in or as if in a global zone.
3. To surround or to encompass.
This entry is located in the following unit: sphero-, spher-, -sphere- (page 11)
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Units related to: “sphere
(Latin: a round body, a ball; round, a sphere; the earth; "sphere" came from Latin globus, "round mass, sphere"; related to gleba, "clod, soil, land". Sense of "planet earth," or a three-dimensional map of it, appeared first in 1553)
(Greek: "blood " plus Latin: "sphere, ball"; oxygen-carrying protein of the red corpuscles)
(without dung beetles, the earth would be one big sphere of dung)
(Greek: ball, round, around; globe, global; body of globular form; by extension, circular zone, circular area)
Word Entries containing the term: “sphere
celestial sphere (s) (noun), celestial spheres (pl)
1. The imaginary orbit around the Earth: The sun, moon, stars, and planets appear to be placed on the celestial sphere.
2. The imaginary shell formed by the sky: The celestial sphere is usually, represented as an infinite circle, the center of which is the observer's position.
This entry is located in the following units: -al; -ial, -eal (page 12) celest- (page 1) sphero-, spher-, -sphere- (page 6)
geodesic sphere (s) (noun), geodesic spheres (pl)
Also known as the "geodesic dome", a dome or structure: A geodesic sphere roughly approximates a hemisphere constructed of many light, straight structural elements in tension, arranged in a framework of triangles to reduce stress and weight.
This entry is located in the following units: geo-, ge- + (page 7) sphero-, spher-, -sphere- (page 7)
inner sphere
The region of the interstellar medium surrounding the earth to a radius of roughly 500 light years.
This entry is located in the following unit: sphero-, spher-, -sphere- (page 8)
sphere gap
1. A spark gap between two equal-diameter spherical electrodes.
2. A spark gap in which the spark passes between two polished metal bails.
This entry is located in the following unit: sphero-, spher-, -sphere- (page 11)
sphere gap voltmeter
An instrument designed to measure high voltages by determining the distance between two metal spheres at which a spark will jump.
This entry is located in the following units: sphero-, spher-, -sphere- (page 11) volt + (page 3)
sphere of attraction
1. The distance within which the potential energy arising from mutual attraction of two molecules is not negligible with respect to the molecules' average thermal energy at room temperature.
2. In physical chemistry, the area between two molecules within which the energy generated by their mutual attraction is significant enough to be distinguished from the average energy of other molecules in the system.
sphere of influence
An area of the world dominated politically or economically by a country, or certain countries.
sphere of reflection
In crystallography, a construction for considering conditions for diffraction in terms of the reciprocal rather than the real lattice.

It is a sphere with the incident beam along a diameter. The origin of the reciprocal lattice is positioned at the point where the incident beam emerges from the sphere.

Whenever a reciprocal lattice point touches the surface of the sphere, the conditions for a diffracted (or reflected) beam are satisfied.

This entry is located in the following unit: sphero-, spher-, -sphere- (page 12)
sphere photometer, integrating-sphere photometer
An instrument for measuring the total luminous flux of a lamp or luminaire; the source is placed inside a sphere whose inside surface has a diffusely reflecting white finish, and the light reflected from this surface onto a window is measured by an ordinary photometer.
This entry is located in the following units: integ- (page 2) sphero-, spher-, -sphere- (page 12)
sublunary sphere
A concept derived from Greek astronomy in which the region of the cosmos from the earth to the moon, consists of the four classical elements: earth, water, air, and fire.

Beginning with the moon, up to the limits of the universe, everything is made of ether.

Word Entries at Get Words: “sphere
sphere
A solid that is bounded by a curved surface.

Any point measured from the outside of the sphere to the center of the sphere is equal in distance.

This entry is located in the following unit: Measurements and Mathematics Terms (page 9)
Word Entries at Get Words containing the term: “sphere
celestial sphere
1. The imaginary sphere surrounding the earth, with the stars and other astronomical objects attached to it.
2. An imaginary sphere on the inside of which the celestial bodies seem to lie.

The positions of bodies; such as, stars, planets, and galaxies are specified by their coordinates on the celestial sphere.

This entry is located in the following unit: Astronomy and related astronomical terms (page 6)