center
['sentә]
n. , 点, 锋

a. , 位正

vt. 集,

vi.

[] ;

[医] , , 枢

1. The topic centers on the crisis in these two countries.
   话题那两危。
2. Beijing is the political and financial center of China.
   京政治金融。
3. He moved the table over to the center of the room.
   把桌移房。

center
[ noun ]

1. an area that is approximately central within some larger region

<noun.location>
it is in the center of town
they ran forward into the heart of the struggle
they were in the eye of the storm

2. the piece of ground in the outfield directly ahead of the catcher

<noun.artifact>
he hit the ball to deep center

3. a building dedicated to a particular activity

<noun.artifact>
they were raising money to build a new center for research

4. a point equidistant from the ends of a line or the extremities of a figure

<noun.location>

5. the choicest or most essential or most vital part of some idea or experience

<noun.cognition>
the gist of the prosecutor's argument
the heart and soul of the Republican Party
the nub of the story

6. the object upon which interest and attention focuses

<noun.cognition>
his stories made him the center of the party

7. a cluster of nerve cells governing a specific bodily process

<noun.body>
in most people the speech center is in the left hemisphere

8. the middle of a military or naval formation

<noun.group>
they had to reinforce the center

9. (basketball) the person who plays center on a basketball team

<noun.person>

10. (football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback

<noun.person>
the center fumbled the handoff

11. a place where some particular activity is concentrated

<noun.location>
they received messages from several centers

12. politically moderate persons; centrists

<noun.group>

13. (ice hockey) the person who plays center on a hockey team

<noun.person>

14. the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering

<noun.food>

15. mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace

<noun.artifact>
a good plaza should have a movie house
they spent their weekends at the local malls

16. the position on a hockey team of the player who participates in the face off at the beginning of the game

<noun.act>

17. (American football) the position of the player on the line of scrimmage who puts the ball in play

<noun.act>
it is a center's responsibility to get the football to the quarterback

18. a position on a basketball team of the player who participates in the jump that starts the game

<noun.act>

[ verb ]

1. center upon

<verb.stative> center on concentrate on focus on revolve about revolve around
Her entire attention centered on her children
Our day revolved around our work

2. direct one's attention on something

<verb.cognition> centre concentrate focus pore rivet
Please focus on your studies and not on your hobbies

3. move into the center

<verb.motion> centre
That vase in the picture is not centered

[ adj ]

1. of or belonging to neither the right nor the left politically or intellectually

<adj.all>

2. equally distant from the extremes

<adj.all>

Center \Cen"ter\, n. [F. centre, fr. L. centrum, fr. round which
a circle is described, fr. ? 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.

2. The middle or central portion of anything.

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.

4. The earth. [Obs.] --Shak.

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}.

6. (Arch.) A temporary structure upon which the materials of
a vault or arch are supported in position until the work
becomes self-supporting.

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.

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.

{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 co["o]rdinates.
See {Co["o]rdinates}.

{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.


Center \Cen"ter\, Centre \Cen"tre\, v. t.
1. To place or fix in the center or on a central point.
--Milton.

2. To collect to a point; to concentrate.

Thy joys are centered all in me alone. --Prior.

3. (Mech.) To form a recess or indentation for the reception
of a center.


Center \Cen"ter\, Centre \Cen"tre\ v. i. [imp. & p. p.
{Centered} or {Centred}; p. pr. & vb. n. {Centering} or
{Centring}.]
1. To be placed in a center; to be central.

2. To be collected to a point; to be concentrated; to rest
on, or gather about, as a center.

Where there is no visible truth wherein to center,
error is as wide as men's fancies. --Dr. H. More.

Our hopes must center in ourselves alone. --Dryden.