Crossword-Solution: QUADRIC 7 letters, 3 clues 🏆 scrabble score: 19

They are thus generating lines of a _cone of the second order_, or _quadric cone_, so called because every plane in space not passing through _S_ cuts it in a point-row of the second order, and every line also cuts it in at most two points.

See Quantity.] (Math.) Defn: A homogeneous algebraic function of two or more variables, in general containing only positive integral powers of the variables, and called quadric, cubic, quartic, etc., according as it is of the second, third, fourth, fifth, or a higher degree.

The diameter of a quadric surface is a line at the extremities of which the tangent planes are parallel.

Now from a quadric equation we derive, in like manner, the notion of a complex or imaginary number such as is spoken of above.

And if we consider first a quadric equation x² + px + q = 0 where p and q are real numbers, and next the like equation, where p and q are any numbers whatever, it can be shown that there exists for x a numerical value which satisfies the equation; or, in other words, it can be shown that the equation has a numerical root.