| Quaalude |
trademark for the sedative drug methaqualone. |
| quack1 |
the sound made by a duck, or a similar sound. [2 definitions] |
| quack2 |
someone who practices medicine incompetently and often without proper training. [4 definitions] |
| quackery |
the claims, methods, or practice of a quack. |
| quack grass |
see couch grass. |
| quad1 |
a large, open, usu. grassy area with buildings on all four sides, esp. on a college campus; quadrangle. |
| quad2 |
in printing, a piece of type that does not register, used for filling blank areas and spaces. [2 definitions] |
| quad3 |
a quadruplet. |
| quad4 |
quadraphonic. [2 definitions] |
| quad5 |
a unit of energy equal to one quadrillion British thermal units. |
| Quadragesima |
the first Sunday of Lent. |
| quadrangle |
a closed two-dimensional figure with four sides, such as a rectangle or parallelogram. [3 definitions] |
| quadrant |
one quarter of the arc of a circle. [5 definitions] |
| quadraphonic |
of, concerning, or used for the reproduction of sound, esp. music, over four distinct channels. |
| quadrat |
see quad2. [2 definitions] |
| quadrate |
a square or rectangle. [5 definitions] |
| quadratic |
of, concerning, or involving mathematical expressions containing a variable that is raised to the second power at most. [2 definitions] |
| quadratic equation |
in algebra, an equation in which the square is the highest power to which the unknown quantity is raised. |
| quadrature |
the act or process of squaring. [3 definitions] |
| quadrennial |
happening once every four years. [3 definitions] |
| quadri- |
four. |