n. the point representing the mean position of the matter in a body.
Syn. -- centroid, center of mass. [ WordNet 1.5 ]

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 attraction. [ 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 ]

☞ 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 ]

pos>adj. 1. being or placed in the center. [ WordNet 1.5 ]

2. concentrated on or clustered around a central point or purpose.
Syn. -- centred, centralized, focused. [ WordNet 1.5 ]

pos>n. (Baseball) The part of the outfield directly ahead of the catcher.
Syn. -- center. [ WordNet 1.5 ]

. See under Cartridge. [ 1913 Webster ]

n. (Arch.) Same as Center, n., 6. [ Written also centring. ] [ 1913 Webster ]

{ }. (Gas Manuf.) A compound hydraulic valve for regulating the passage of the gas through a set of purifiers so as to cut out each one in turn for the renewal of the lime. [ Webster 1913 Suppl. ]

{ } v. t. 1. To place or fix in the center or on a central point. Milton. [ 1913 Webster ]

2. To collect to a point; to concentrate. [ 1913 Webster ]

Thy joys are centered all in me alone. Prior. [ 1913 Webster ]

3. (Mech.) To form a recess or indentation for the reception of a center. [ 1913 Webster ]

{ } 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. [ 1913 Webster ]

2. To be collected to a point; to be concentrated; to rest on, or gather about, as a center. [ 1913 Webster ]

Where there is no visible truth wherein to center, error is as wide as men's fancies. Dr. H. More. [ 1913 Webster ]

Our hopes must center in ourselves alone. Dryden. [ 1913 Webster ]

{ } n. An instrument turning on a center, for boring holes. See Bit, n., 3. [ 1913 Webster ]

{ } n. (Naut.) A retractable or sliding keel used on sailboats, formed of a broad board or slab of wood or metal which may be raised into a water-tight case amidships, when in shallow water, or may be lowered to increase the area of lateral resistance and prevent drifting to leeward when the vessel is beating to windward. It is used in vessels of all sizes along the coast of the United States
Syn. -- centreboard, drop keel, sliding keel. [ 1913 Webster ]

{ } n. 1. An ornament to be placed in the center, as of a table, ceiling, atc.; a central article or figure. [ 1913 Webster ]

2. Specifically: An arrangement of flowers placed in the center of a table as an ornament while dining. [ PJC ]

3. The central or most important feature of an activity, plan, or object; as, the centerpiece of her campaign was a proposal to slash taxes. [ PJC ]

{ or }. (Mech.) (a) A punch for making indentations or dots in a piece of work, as for suspension between lathe centers, etc. (b) A punch for punching holes in sheet metal, having a small conical center to insure correct locating. [ Webster 1913 Suppl. ]

{ or }. (Gas Manuf.) A compound hydraulic valve for regulating the passage of the gas through a set of purifiers so as to cut out each one in turn for the renewal of the lime. [ Webster 1913 Suppl. ]

n. (Geom.) The center of a circle that circumscribes a triangle. [ 1913 Webster ]

{ } v. i. [ imp. & p. p. Concentered or Concentred p. pr & vb. n. Concentering r Concentring ] [ F. concentrer, fr. L. con- + centrum center. See Center, and cf. Concentrate ] To come to one point; to meet in, or converge toward, a common center; to have a common center. [ 1913 Webster ]

God, in whom all perfections concenter. Bp. Beveridge. [ 1913 Webster ]

{ }, v. t. To draw or direct to a common center; to bring together at a focus or point, as two or more lines; to concentrate. [ 1913 Webster ]

In thee concentering all their precious beams. Milton. [ 1913 Webster ]

All is concentered in a life intense. Byren. [ 1913 Webster ]

n. (Geom.) The center of the circle inscribed in a triangle. [ 1913 Webster ]

adj. same as left-wing.
Syn. -- leftist, left-wing. [ WordNet 1.5 ]

{ it>or }, n. [ Pref. meta- + center. ] (Hydrostatics) The point of intersection of a vertical line through the center of gravity of the fluid displaced by a floating body which is tipped through a small angle from its position of equilibrium, and the inclined line which was vertical through the center of gravity of the body when in equilibrium. [ 1913 Webster ]

☞ When the metacenter is above the center of gravity, the position of the body is stable; when below it, unstable. [ 1913 Webster ]

adj. situated away from the center or axis. [ WordNet 1.5 ]

n. [ Ortho- + center. ] (Geom.) That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or the sides produced, mutually intersect. [ 1913 Webster ]

v. t. [ Pref. re- + center. ] To center again; to restore to the center. Coleridge. [ 1913 Webster ]

{ } a. 1. Centered in itself, or in one's self. [ 1913 Webster ]

There hangs the ball of earth and water mixt,
Self-centered and unmoved. Dryden. [ 1913 Webster ]

2. interested solely or primiarily in oneself, or one's own welfare; disinclined to consider the interests of others; selfish; egotistical. [ PJC ]

{ a. Centering in one's self. [ 1913 Webster ]

{ } v. t. [ 1st pref. un- + center. ] To throw from its center. [ 1913 Webster ]