Control \Con*trol"\, n. [F. contr[^o]le a counter register,
   contr. fr. contr-r[^o]le; contre (L. contra) + r[^o]le roll,
   catalogue. See Counter and Roll, and cf. Counterroll.]
   1. A duplicate book, register, or account, kept to correct or
      check another account or register; a counter register.
      [Obs.] --Johnson.
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   2. That which serves to check, restrain, or hinder;
      restraint. "Speak without control." --Dryden.
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   3. Power or authority to check or restrain; restraining or
      regulating influence; superintendence; government; as,
      children should be under parental control.
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            The House of Commons should exercise a control over
            all the departments of the executive administration.
                                                  --Macaulay.
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   4. (Mach.) The complete apparatus used to control a mechanism
      or machine in operation, as a flying machine in flight;
      specifically (A["e]ronautics), the mechanism controlling
      the rudders and ailerons.
      [Webster 1913 Suppl.]

   5. (Climatology) Any of the physical factors determining the
      climate of any particular place, as latitude,distribution
      of land and water, altitude, exposure, prevailing winds,
      permanent high- or low-barometric-pressure areas, ocean
      currents, mountain barriers, soil, and vegetation.
      [Webster 1913 Suppl.]

   6. (Technology) in research, an object or subject used in an
      experimental procedure, which is treated identically to
      the primary subject of the experiment, except for the
      omission of the specific treatment or conditions whose
      effect is being investigated. If the control is a group of
      living organisms, as is common in medical research, it is
      called the

   control group.

   Note: For most experimental procedures, the results are not
         considered valid and reliable unless a proper control
         experiment is performed. There are various types of
         control used in experimental science, and often several
         groups of subjects serve as controls, being subjected
         to different variations of the experimental procedure,
         or controlling for several variables being tested. When
         the effects caused by an experimental treatment are not
         consistent and obvious, statistical analysis of the
         results is typically used to determine if there are any
         significant differences between the effects of
         different experimental conditions.
         [PJC]

   7. (Technology) the part of an experimental procedure in
      which the controls[6] are subjected to the experimental
      conditions.
      [PJC]

   8. the group of technical specialists exercising control by
      remote communications over a distant operation, such as a
      space flight; as, the American Mission Control for manned
      flights is located in Houston.
      [PJC]

   Board of control. See under Board.
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Board \Board\ (b[=o]rd), n. [OE. bord, AS. bord board,
   shipboard; akin to bred plank, Icel. bor[eth] board, side of
   a ship, Goth. f[=o]tu-baurd footstool, D. bord board, G.
   brett, bort. See def. 8. [root]92.]
   1. A piece of timber sawed thin, and of considerable length
      and breadth as compared with the thickness, -- used for
      building, etc.
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   Note: When sawed thick, as over one and a half or two inches,
         it is usually called a plank.
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   2. A table to put food upon.
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   Note: The term board answers to the modern table, but it was
         often movable, and placed on trestles. --Halliwell.
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               Fruit of all kinds . . .
               She gathers, tribute large, and on the board
               Heaps with unsparing hand.         --Milton.
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   3. Hence: What is served on a table as food; stated meals;
      provision; entertainment; -- usually as furnished for pay;
      as, to work for one's board; the price of board.
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   4. A table at which a council or court is held. Hence: A
      council, convened for business, or any authorized assembly
      or meeting, public or private; a number of persons
      appointed or elected to sit in council for the management
      or direction of some public or private business or trust;
      as, the Board of Admiralty; a board of trade; a board of
      directors, trustees, commissioners, etc.
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            Both better acquainted with affairs than any other
            who sat then at that board.           --Clarendon.
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            We may judge from their letters to the board.
                                                  --Porteus.
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   5. A square or oblong piece of thin wood or other material
      used for some special purpose, as, a molding board; a
      board or surface painted or arranged for a game; as, a
      chessboard; a backgammon board.
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   6. Paper made thick and stiff like a board, for book covers,
      etc.; pasteboard; as, to bind a book in boards.
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   7. pl. The stage in a theater; as, to go upon the boards, to
      enter upon the theatrical profession.
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   8. [In this use originally perh. a different word meaning
      border, margin; cf. D. boord, G. bord, shipboard, and G.
      borte trimming; also F. bord (fr. G.) the side of a ship.
      Cf. Border.] The border or side of anything. (Naut.)
      (a) The side of a ship. "Now board to board the rival
          vessels row." --Dryden. See On board, below.
      (b) The stretch which a ship makes in one tack.
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   Note: Board is much used adjectively or as the last part of a
         compound; as, fir board, clapboard, floor board,
         shipboard, sideboard, ironing board, chessboard,
         cardboard, pasteboard, seaboard; board measure.
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   The American Board, a shortened form of "The American Board
      of Commissioners for Foreign Missions" (the foreign
      missionary society of the American Congregational
      churches).

   Bed and board. See under Bed.

   Board and board (Naut.), side by side.

   Board of control, six privy councilors formerly appointed
      to superintend the affairs of the British East Indies.
      --Stormonth.

   Board rule, a figured scale for finding without calculation
      the number of square feet in a board. --Haldeman.

   Board of trade, in England, a committee of the privy
      council appointed to superintend matters relating to
      trade. In the United States, a body of men appointed for
      the advancement and protection of their business
      interests; a chamber of commerce.

   Board wages.
      (a) Food and lodging supplied as compensation for
          services; as, to work hard, and get only board wages.
      (b) Money wages which are barely sufficient to buy food
          and lodging.
      (c) A separate or special allowance of wages for the
          procurement of food, or food and lodging. --Dryden.

   By the board, over the board, or side. "The mast went by
      the board." --Totten. Hence (Fig.),

   To go by the board, to suffer complete destruction or
      overthrow.

   To enter on the boards, to have one's name inscribed on a
      board or tablet in a college as a student. [Cambridge,
      England.] "Having been entered on the boards of Trinity
      college." --Hallam.

   To make a good board (Naut.), to sail in a straight line
      when close-hauled; to lose little to leeward.

   To make short boards, to tack frequently.

   On board.
      (a) On shipboard; in a ship or a boat; on board of; as, I
          came on board early; to be on board ship.
      (b) In or into a railway car or train. [Colloq. U. S.]

   Returning board, a board empowered to canvass and make an
      official statement of the votes cast at an election.
      [U.S.]
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