(mathematics) Of a polynomial expression, involving only the zeroth, second, and fourth powers of a variable, as x⁴ + 3x² + 2. Sometimes extended to any expression involving the biquadrate or fourth power (but no higher powers), as x⁴ − 4x³ + 3x² − x + 1.
noun
(mathematics) A biquadratic equation.
quarterback
quarterback
noun
(American football, Canadian football) An offensive back whose primary job is to pass the ball in a play.
(American football, historical) An offensive back who receives the snap (hike) and then blocks the defense from crossing the line of scrimmage; a blocking back.
(rugby football, historical) A position just behind the forwards, or one who plays this position.
verb
(American football) To play the position of quarterback.
(by extension) To lead a team or group; to be primarily responsible for some group project or activity.
quebrachite
racquetball
racquetball
noun
(countable) A ball used for this sport.
(uncountable) A certain sport, similar to squash, but played with a bigger ball.
