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1 definition found
 for Circular instruments
From The Collaborative International Dictionary of English v.0.48 :

  Circular \Cir"cu*lar\, a. [L. circularis, fr. circulus circle:
     cf. F. circulaire. See Circle.]
     [1913 Webster]
     1. In the form of, or bounded by, a circle; round.
        [1913 Webster]
  
     2. repeating itself; ending in itself; reverting to the point
        of beginning; hence, illogical; inconclusive; as, circular
        reasoning.
        [1913 Webster]
  
     3. Adhering to a fixed circle of legends; cyclic; hence,
        mean; inferior. See Cyclic poets, under Cyclic.
        [1913 Webster]
  
              Had Virgil been a circular poet, and closely adhered
              to history, how could the Romans have had Dido?
                                                    --Dennis.
        [1913 Webster]
  
     4. Addressed to a circle, or to a number of persons having a
        common interest; circulated, or intended for circulation;
        as, a circular letter.
        [1913 Webster]
  
              A proclamation of Henry III., . . . doubtless
              circular throughout England.          --Hallam.
        [1913 Webster]
  
     5. Perfect; complete. [Obs.]
        [1913 Webster]
  
              A man so absolute and circular
              In all those wished-for rarities that may take
              A virgin captive.                     --Massinger.
        [1913 Webster]
  
     Circular are, any portion of the circumference of a circle.
        
  
     Circular cubics (Math.), curves of the third order which
        are imagined to pass through the two circular points at
        infinity.
  
     Circular functions. (Math.) See under Function.
  
     Circular instruments, mathematical instruments employed for
        measuring angles, in which the graduation extends round
        the whole circumference of a circle, or 360[deg].
  
     Circular lines, straight lines pertaining to the circle, as
        sines, tangents, secants, etc.
  
     Circular+note{+or+Circular+letter">Circular note{ or Circular letter.
        (a) (Com.) See under Credit.
        (b) (Diplomacy) A letter addressed in identical terms to a
            number of persons.
  
     Circular numbers (Arith.), those whose powers terminate in
        the same digits as the roots themselves; as 5 and 6, whose
        squares are 25 and 36. --Bailey. --Barlow.
  
     Circular points at infinity (Geom.), two imaginary points
        at infinite distance through which every circle in the
        plane is, in the theory of curves, imagined to pass.
  
     Circular polarization. (Min.) See under Polarization.
  
     Circular sailing or Globular sailing (Naut.), the method
        of sailing by the arc of a great circle.
  
     Circular saw. See under Saw.
        [1913 Webster]

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