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“motion”
motion
This entry is located in the following units:
mot-, moto-, -motile, -motility, -motorial, -motoric, -motive, -motored; mov-
(page 4)
-tion
(page 16)
Units related to:
“motion”
(Latin: move, motion)
(Latin: swing, vibrate, move, motion; from oscillum, a diminutive form of osoris, "mouth, face, small face")
(Latin: to quiver, to oscillate, to shake, to move; motion)
(Latin: to set in motion, to hurry, to shake; to drive; to do, to act; to lead, to conduct, to guide)
(Greek: struggle, a contest, to contend for a prize; also, to lead, set in motion, drive, conduct, guide, govern; to do, to act; by extension, pain)
(Latin: to be in motion; to go, to go away, to yield, to give up, to withdraw)
(Greek: move, movement, set in motion)
(Latin: talk, speak, say; to put into quick motion, to excite, to provoke, to call urgently; to summon, to summon forth, to arouse, to stimulate; used in the sense of "stimulating")
(getting a "fire in the head" in order to get the flame of creativity in motion)
(Greek > Latin: driven on, set in motion; driven, set in motion; ductile; elasticity, elastic)
(Latin: a suffix; from agere to set in motion, to drive, to lead; to do, to act)
(Greek: turning, spinning, whirling, bend, circular motion; originally, "circle, curved, ring")
(Greek: from ancient Greek hormáein [hormein], "to set in motion, impel, urge on")
(Greek: to rouse or to set in motion)
(Greek: move, set in motion; muscular activity)
(Latin: move, moving, to set in motion)
(passively drifting and wandering in the sky)
(Greek: regularly recurring motion; measured motion)
(origin and background of the study of animals in motion)
Word Entries containing the term:
“motion”
perpetual motion
1. The action of a moving device which requires no input of energy to maintain it, and so it can continue operating indefinitely.
2. In thermodynamics, the unproven theory that when a machine produces work, it can continue to operate for an indefinite time solely by the use of its own energy.
2. In thermodynamics, the unproven theory that when a machine produces work, it can continue to operate for an indefinite time solely by the use of its own energy.
Various supposed perpetual motion machines have been described in the past before a valid understanding of the laws of thermodynamics became accepted.
This entry is located in the following unit:
peti-, pet-, -pit-
(page 3)
rigid body, rigid-body motion, rigid-body dynamics
1. In mechanics, a body which does not change its shape or size regardless of the force applied to it; that is, the relative position of its component particles is absolutely fixed in positon relative to each other.
2. An actual body whose behavior approaches that of an ideal rigid body; such as, a steel beam.
3. An idealized extended solid whose size and shape are definitely fixed and remain unaltered when forces are applied.
2. An actual body whose behavior approaches that of an ideal rigid body; such as, a steel beam.
3. An idealized extended solid whose size and shape are definitely fixed and remain unaltered when forces are applied.
The rigid body assumption is a mathematical convenience that is useful and gives correct results for many important phenomena.
This entry is located in the following units:
mot-, moto-, -motile, -motility, -motorial, -motoric, -motive, -motored; mov-
(page 7)
rigi-, rig-
(page 2)
Word Entries at Get Words containing the term:
“motion”
apparent motion
The movement of a celestial body against the background of distant stars.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 3)
epicyclic motion
According to the geocentric Ptolemaic system, planetary orbits have two components: a circular or deferent orbit around the parent body; and a smaller circular orbit, or epicycle, around a point on the deferent orbit.
The deferent is the large circular orbit around which a planet was thought to orbit, in one or many epicycles.
Epicycles are circular orbits within orbits that were used to (incorrectly) describe the orbits of objects in the Ptolemaic system (about A.D. 150).
Epicycles and deferents were used to predict orbits until Kepler discovered the elliptical nature of orbits (early in the 1600's).
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 10)
Planets in motion
Passively drifting and wandering in the sky unit.
This entry is located in the following unit:
Units of Special Compositions, Topics, or Subjects That Provide Special Information
(page 5)
proper motion
The movement of a star in the celestial sphere which is more noticeable in near stars than in distant stars; in practice, the movement of the latter is negligible.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 20)
retrograde motion
1. The apparent backward movement, or reversal of direction, by outer planets in the solar system.
Retrograde motion is simply an optical illusion, created by the fact that the earth is orbiting the sun much faster than the outer planets are.
2. The clockwise, or east to west, motion of a body, and hence the reverse of direct motion.As the majority of bodies in the solar-system orbit around their governing bodies; that is, the sun or planet, in direct motion; the occurrence of retrograde motion usually indicates some peculiarity.
This entry is located in the following units:
Astronomy and related astronomical terms
(page 22)
Science and Technology Words from the Ancient Past to the Present, Part 1
(page 6)
robot motion
The motions developed by a robot element.
This entry is located in the following unit:
Robots, Robotic Topics, and Robot References +
(page 2)