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| accelerator |
in nuclear physics, a device that creates high-energy particles by acceleration through electrostatic or electromagnetic means, used for research. [1/3 definitions] |
| acoustics |
(used with a sing. verb) the branch of science dealing with the physics of sound. [1/2 definitions] |
| activate |
in physics, to cause radioactive properties in (a substance). [1/6 definitions] |
| albedo |
in physics, the degree to which particles such as neutrons are reflected by a surface that they strike. [1/2 definitions] |
| amplitude |
in physics, the maximum value of an oscillating quantity. [1/3 definitions] |
| antimatter |
in physics, matter having particles comparable to those of common matter, but with opposite electrical charges or magnetic characteristics. |
| antineutrino |
in physics, the antiparticle of a neutrino. |
| antineutron |
in physics, the antiparticle of a neutron. |
| antiparticle |
in physics, either of two subatomic particles that have the same mass, spin, degree of charge, and magnetic moment but that have opposite signs of charge and directions of magnetic moment and whose collision causes mutual annihilation. |
| antiproton |
in physics, the antiparticle of a proton. |
| astrophysics |
(used with a sing. verb) the branch of physics that deals with the physical and chemical properties of heavenly bodies and interstellar space. |
| baryon |
in physics, a heavy subatomic particle of half-integral spin, such as a proton, neutron, or hyperon. |
| betatron |
in physics, an electron accelerator in which the speed of the electrons is increased to high energies, from a few million to a few hundred million electron volts, by the action of a rapidly changing magnetic field. |
| biophysics |
(used with a sing. verb) the branch of biology in which the principles and methods of physics are applied to the study of biological forms and processes. |
| blackbody |
in physics, a hypothetical body that theoretically absorbs all radiant energy falling on its surface. |
| capillary |
in physics, pertaining to or characteristic of capillarity. [1/6 definitions] |
| chain reaction |
in physics, a self-sustaining reaction in which the particles produced by nuclear fission cause the fission of other nuclei. [1/3 definitions] |
| charm |
in physics, a property of one type of quark. [1/11 definitions] |
| chromodynamics |
in particle physics, the theory of the strong interaction between quarks and gluons, fundamental particles that form hadrons such as the proton and neutron. |
| collider |
in nuclear physics, a type of accelerator in which occurs the bombardment of certain charged particles by certain others, such as electrons and positrons; colliding-beam machine. |
| conservation of energy |
a principle of physics that asserts that the total energy in a closed system remains constant regardless of changes in the system. |
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