quadratic

• POS: Adjective, Noun
• HYPHEN: quad=rat=ic

CIDE DICTIONARY

quadratic, a. [Cf. F. quadratique.].

•  Of or pertaining to a square, or to squares; resembling a quadrate, or square; square.  [1913 Webster]
•  Tetragonal.  [1913 Webster]
•  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]

OXFORD DICTIONARY

quadratic, adj. & n. Math.
--adj.
1 involving the second and no higher power of an unknown quantity or variable (quadratic equation).
2 square.
--n.
1 a quadratic equation.
2 (in pl.) the branch of algebra dealing with these.

Etymology

F quadratique or mod.L quadraticus (as QUADRATE)

ROGET THESAURUS

quadratic

Four

N quaternity, four, tetrad, quartet, quaternion, square, quarter, tetract, tetragon, quadrangle, rectangle, tetrahedron, quadrature, quadrifoil, quadriform, quadruplet, quatrefoil, tetrapod, quadrangle, quad, quadrupole, quadrivium, four, quaternary, quaternal, quadratic, quartile, tetract, tetractic, tetractinal, tetrad, tetragonal, square, quadrate.