Physics
- relativity
(physics) the theory that space and time are relative concepts rather than absolute ...
- theory of gravitation
(physics) the theory that any two particles of matter attract one another...
- kinetic theory
(physics) a theory that gases consist of small particles in random motion.
- quantum theory
(physics) a physical theory that certain properties occur only in discrete amounts...
- wave theory
(physics) the theory that light is transmitted as waves.
- corpuscular theory
(physics) the theory that light is transmitted as a stream of particles.
- supersymmetry
(physics) a theory that tries to link the four fundamental forces; "according to supersymmetry...
Cosmology
- big-bang theory
(cosmology) the theory that the universe originated sometime between 10 billion...
- nebular hypothesis
(cosmology) the theory that the solar system evolved from a hot gaseous nebu...
- planetesimal hypothesis
(cosmology) the theory that the solar system was formed by the gravitational...
- steady state theory
(cosmology) the theory that the universe maintains a constant average density...
Psychology
- functionalism
A psychology based on the assumption that all mental process are useful to an organism...
- Gestalt psychology
(psychology) a theory of psychology that emphasizes the importance of configurational...
- associationism
(psychology) a theory that association is the basic principle of mental activity.
- atomism
(psychology) a theory that reduces all mental phenomena to simple elements (sensations and...
Biology
- theory of evolution
(biology) a scientific theory of the origin of species of plants and animal...
- theory of inheritance
(biology) a theory of how characteristics of one generation are derived from...
- cell theory
(biology) the theory that cells form the fundamental structural and functional units...
Chemistry
- theory of dissociation
(chemistry) theory that describes aqueous solutions in terms of acids (which...
- theory of indicators
(chemistry) the theory that all indicators are either weak acids or weak bases...
Also contains
- atomic theory
A theory of the structure of the atom.
- game theory
(economics) a theory of competition stated in terms of gains and losses among opposing...
- organicism
Theory that the total organization of an organism rather than the functioning of individual...
- uncertainty principle
(quantum theory) the theory that it is impossible to measure both energy and...
- information theory
(computer science) a statistical theory dealing with the limits and efficiency...
- germ theory
(medicine) the theory that all contagious diseases are caused by microorganisms.