A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained
I reckon that confirms my theory
A unified theory involving branes that subsumes eleven-dimensional supergravity and the five ten-dimensional superstring theories.
Used in describing what is supposed to happen or be possible, usually with the implication that it does not in fact happen
A theory that assumes the existence of atoms or an atomic constitution; (Science) atomic theory.
A theory of the structure of atoms stating that electrons revolve in discrete orbits around a positively charged nucleus and that radiation is given off or absorbed only when an electron moves from one orbit to another
(In Chomskyan linguistics) a theory that seeks to explain how Case is assigned to nominal phrases.
The theory that cells are the fundamental structural and functional units of life, sufficient to constitute a single-celled organism and serving as the working units of every multicellular organism.
The branch of mathematics concerned with the analysis of strategies for dealing with competitive situations where the outcome of a participant’s choice of action depends critically on the actions of other participants. Game theory has been applied to contexts in war, business, and biology
The theory that infectious diseases are caused by microorganisms.
A theory based on the belief that each race possesses specific characteristics, abilities, qualities, etc., especially distinguishing it as superior or inferior.
The branch of algebra concerned with rings and their applications.
The branch of mathematics that deals with the formal properties of sets as units (without regard to the nature of their individual constituents) and the expression of other branches of mathematics in terms of sets
Composed of facts and observation rather than theories or speculation.
Any of various tests that examine a person's knowledge of the theoretical aspects of a subject or area of study, especially as contrasted with practical abilities; now specifically (chiefly British) the written component of a driving test.
The theory that light is propagated through the ether by a wave motion imparted to the ether by the molecular vibrations of the radiant body
The theory that all matter is made up of tiny indivisible particles (atoms). According to the modern version, the atoms of each element are effectively identical, but differ from those of other elements, and unite to form compounds in fixed proportions
A critical theory or approach based on a belief that a film-maker may be considered as the creator of a body of art, with individual styles, themes, and techniques identifiable throughout their work.
The branch of mathematics that deals with complex systems whose behavior is highly sensitive to slight changes in conditions, so that small alterations can give rise to strikingly great consequences
The theory that a political event in one country will cause similar events in neighboring countries, like a falling domino causing an entire row of upended dominoes to fall
A theory that explains physical phenomena in terms of a field and the manner in which it interacts with matter or with other fields
A method of applying group theory to the solution of algebraic equations
A quantum theory using mathematical functions to describe subatomic interactions in terms of particles that are not directly detectable
The mathematical theory of the properties and applications of graphs
Mathematics and Science. The branch of algebra concerned with the properties and applications of groups.
A theory which seeks to encompass all aspects of some subject or phenomenon; (specifically in Economics), macroeconomic theory.
A theory based on or involving a representation or model, whether actual or conceptual.
Any of various psychological theories that state that muscular movements or other motor elements of the nervous system are necessary for perception, learning, memory, etc.; used especially with reference to theories that maintain that the movements of articulation and the sensory feedback from these are essential for speech perception.
(The study of) the theoretical aspects of music and its notation, especially as opposed to actual performance.
The theory (now universally accepted) that the nervous system is composed of individual, structurally similar but discrete cells (as opposed to a syncytial network).
The branch of mathematics that deals with the properties and relationships of numbers, especially the positive integers
The branch of mathematics concerned with the syntactic (as opposed to semantic) properties of formulae and proofs in formal systems.
An approach to social and cultural study which seeks to challenge or deconstruct traditional ideas of sexuality and gender, especially the acceptance of heterosexuality as normative and the perception of a rigid dichotomy of male and female traits.
= queueing theory.
A cosmological theory based on the existence of cosmic strings
Unwilling or unable to recognize facts which run contrary to a preferred theory (now rare).
Denoting a term, concept, or statement that has meaning only as part of some theory, so that its use implies the acceptance of that theory
A person who propagates theories.
A person concerned more with forming or shaping theories than with practical matters.
Political Economy the Marxist labour theory of value, which relates the value of a commodity to the labour and cost of its production.
The study of formally defined automata.
= cell theory (now historical).
The quantitative study of control systems.
A philosophical approach to culture, and especially to literature, that seeks to confront the social, historical, and ideological forces and structures that produce and constrain it. The term is applied particularly to the work of the Frankfurt School
The mathematical study of strategies for optimal decision-making between options involving different risks or expectations of gain or loss depending on the outcome
Art and Literary Criticism the theory that the purpose of art or literature is to express emotion.
The theory that the balance and condition of the four humours, or (in later use) the body fluids generally, are responsible for states of health and disease; any theory of this nature (now historical).
The materialist theory that physiological and mental perceptions are identical.
The body of theory that explains the physical properties of matter in terms of the motions of its constituent particles