Science and Mathematics
- Quadriceps, a group of muscles
- Quadruped, a creature or mechanism which moves on four legs
- Quad (energy), a unit of energy (short for quadrillion) defined as 1015 British thermal units (about 1.055 exajoule (EJ) or 1.055 × 1018 J)
- Quadrilateral, a four sided figure in plane geometry
- Quadratic, the second power in mathematics
- Quadrangle (geography), a 7.5-minute topographic map produced by the United States Geological Survey, covering in greater detail one quarter of the area of a 15-minute map
- Quadrilateralized Spherical Cube, a mapping scheme for data collected on a spherical surface, such as a planet
- QUaD, a telescope located at the South Pole that is designed to measure the cosmic microwave background radiation polarization
- Quadratic Formula, the equation used to solve quadratic equations
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Famous quotes containing the words science and, science and/or mathematics:
“The most useful and honorable science and occupation for a woman is the science of housekeeping. I know some that are miserly, very few that are good managers.”
—Michel de Montaigne (1533–1592)
“Oh, what does science not conceal today! How much, at any rate, is it meant to conceal!”
—Friedrich Nietzsche (1844–1900)
“The three main medieval points of view regarding universals are designated by historians as realism, conceptualism, and nominalism. Essentially these same three doctrines reappear in twentieth-century surveys of the philosophy of mathematics under the new names logicism, intuitionism, and formalism.”
—Willard Van Orman Quine (b. 1908)