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

quadratic \quadrat"ic\, a. cf. f. quadratique.
   1913 webster
   1. of or pertaining to a square, or to squares; resembling a
      quadrate, or square; square.
      1913 webster

   2. crystallog. tetragonal.
      1913 webster

   3. alg. pertaining to terms of the second degree; as, a
      quadratic equation, in which the highest power of the
      unknown quantity is a square.
      1913 webster

[2] : WordNet (r) 2.0

quadratic
     adj 1: of or relating to or resembling a square; "quadratic shapes"
     2: of or relating to the second power; "quadratic equation"
     n 1: an equation in which the highest power of an unknown
          quantity is a square syn: quadratic equation
     2: a polynomial of the second degree syn: quadratic
        polynomial
see also:
quadratic equation quadratic polynomial 

Quadratic >> Q Words
Quadratic, definition of term: Quadratic
quadratic_pag1.html

Quadratic Equat >> Q Words
Quadratic Equat, definition of term: Quadratic Equat
quadratic+equat_pag1.html