(definition) by Webster 1913 Wed Dec 22 1999 at 2:24:41

Quad*rat"ic (?), a. [Cf. F. quadratique.]

1.

Of or pertaining to a square, or to squares; resembling a quadrate, or square; square.

2. Crystallog.

Tetragonal.

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.

 

© Webster 1913.

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