[1] : The Collaborative International Dictionary of English v.0.48

oscillation \os`cilla"tion\, n. l. oscillatio a swinging.
   1913 webster
   1. the act of oscillating; a swinging or moving backward and
      forward, like a pendulum; vibration.
      1913 webster

   2. fluctuation; variation; change back and forth.
      1913 webster

            his mind oscillated, undoubtedly; but the extreme
            points of the oscillation were not very remote.
                                                  --macaulay.
      1913 webster

   axis of oscillation, center of oscillation. see under
      axis, and center.
      1913 webster
see also:
axis of oscillation center of oscillation axis center 

[2] : The Collaborative International Dictionary of English v.0.48

center \cen"ter\ se^n"t~er, n. f. centre, fr. l. centrum,
   fr. gr. ke`ntron any sharp point, the point round which a
   circle is described, fr. kentei^n to prick, goad.
   1. a point equally distant from the extremities of a line,
      figure, or body, or from all parts of the circumference of
      a circle; the middle point or place.
      1913 webster

   2. the middle or central portion of anything.
      1913 webster

   3. a principal or important point of concentration; the
      nucleus around which things are gathered or to which they
      tend; an object of attention, action, or force; as, a
      center of attaction.
      1913 webster

   4. the earth. obs. --shak.
      1913 webster

   5. those members of a legislative assembly as in france who
      support the existing government. they sit in the middle of
      the legislative chamber, opposite the presiding officer,
      between the conservatives or monarchists, who sit on the
      right of the speaker, and the radicals or advanced
      republicans who occupy the seats on his left, see right,
      and left.
      1913 webster

   6. arch. a temporary structure upon which the materials of
      a vault or arch are supported in position until the work
      becomes self-supporting.
      1913 webster

   7. mech.
      a one of the two conical steel pins, in a lathe, etc.,
          upon which the work is held, and about which it
          revolves.
      b a conical recess, or indentation, in the end of a
          shaft or other work, to receive the point of a center,
          on which the work can turn, as in a lathe.
          1913 webster

   note: in a lathe the

   live center is in the spindle of the head stock; the

   dead center is on the tail stock.

   planer centers are stocks carrying centers, when the object
      to be planed must be turned on its axis.
      1913 webster

   center of an army, the body or troops occupying the place
      in the line between the wings.

   center of a curve or center of a surface geom.
      a a point such that every line drawn through the point
          and terminated by the curve or surface is bisected at
          the point.
      b the fixed point of reference in polar coordinates. see
          coordinates.

   center of curvature of a curve geom., the center of that
      circle which has at any given point of the curve closer
      contact with the curve than has any other circle whatever.
      see circle.

   center of a fleet, the division or column between the van
      and rear, or between the weather division and the lee.

   center of gravity mech., that point of a body about which
      all its parts can be balanced, or which being supported,
      the whole body will remain at rest, though acted upon by
      gravity.

   center of gyration mech., that point in a rotating body
      at which the whole mass might be concentrated
      theoretically without altering the resistance of the
      intertia of the body to angular acceleration or
      retardation.

   center of inertia mech., the center of gravity of a body
      or system of bodies.

   center of motion, the point which remains at rest, while
      all the other parts of a body move round it.

   center of oscillation, the point at which, if the whole
      matter of a suspended body were collected, the time of
      oscillation would be the same as it is in the actual form
      and state of the body.

   center of percussion, that point in a body moving about a
      fixed axis at which it may strike an obstacle without
      communicating a shock to the axis.

   center of pressure hydros., that point in a surface
      pressed by a fluid, at which, if a force equal to the
      whole pressure and in the same line be applied in a
      contrary direction, it will balance or counteract the
      whole pressure of the fluid.
      1913 webster center
see also:
right left live center dead center planer centers center of an army 
center of a curve center of a surface coordinates center of curvature of a curve circle 
center of a fleet center of gravity center of gyration center of inertia center of motion 
center of oscillation center of percussion center of pressure 

Center >> C Words
Center, definition of term: Center
center_pag1.html

Oscillation >> O Words
Oscillation, definition of term: Oscillation
oscillation_pag1.html

Center On >> C Words
Center On, definition of term: Center On
center+on_pag1.html

Brooklyn Center >> B Words
Brooklyn Center, definition of term: Brooklyn Center
brooklyn+center_pag1.html

Medical Center >> M Words
Medical Center, definition of term: Medical Center
medical+center_pag1.html

Le Center >> L Words
Le Center, definition of term: Le Center
le+center_pag1.html

Center Of Mass >> C Words
Center Of Mass, definition of term: Center Of Mass
center+of+mass_pag1.html

Center Of Atten >> C Words
Center Of Atten, definition of term: Center Of Atten
center+of+atten_pag1.html

Center Of Gravi >> C Words
Center Of Gravi, definition of term: Center Of Gravi
center+of+gravi_pag1.html

Day Care Center >> D Words
Day Care Center, definition of term: Day Care Center
day+care+center_pag1.html