QUADRATIC

quadratic. Quadratic, a. relating to or including a square

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Quad‐rat″ic (?), a. [[Cf. F. quadratique.]] 1. 1. Of or pertaining to a square, or to squares; resembling a quadrate, or square; square.
2. 2. (Crystallog.) Tetragonal.
3. 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.