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hypothesis British & World English

A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

hypothesis English Thesaurus

his ‘steady state’ hypothesis of the origin of the universe

Eve hypothesis British & World English

The hypothesis (based on study of mitochondrial DNA) that modern humans have a common female ancestor who lived in Africa around 200,000 years ago

Gaia hypothesis British & World English

The theory, put forward by James Lovelock, that living matter on the earth collectively defines and regulates the material conditions necessary for the continuance of life. The planet, or rather the biosphere, is thus likened to a vast self-regulating organism

null hypothesis British & World English

(In a statistical test) the hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error

hypothesis testing British & World English

The theory, methods, and practice of testing a hypothesis by comparing it with the null hypothesis. The null hypothesis is only rejected if its probability falls below a predetermined significance level, in which case the hypothesis being tested is said to have that level of significance

continuum hypothesis British & World English

The assertion that there is no transfinite cardinal between the cardinal of the set of positive integers and that of the set of real numbers

Red Queen hypothesis British & World English

The hypothesis that organisms are constantly struggling to keep up with one another in an evolutionary race between predator and prey species

Sapir–Whorf hypothesis British & World English

A hypothesis, first advanced by Edward Sapir in 1929 and subsequently developed by Benjamin Whorf, that the structure of a language determines a native speaker’s perception and categorization of experience

adaptive expectations hypothesis British & World English

The hypothesis that expectations of future values of a variable can be based primarily on its values in the recent past

rational expectations hypothesis British & World English

The hypothesis that an economic agent will make full use of all available information when forming expectations, especially with regard to inflation, and not just past values of a particular variable

nebular theory British & World English

The theory that the solar and stellar systems were developed from a primeval nebula

nebular hypothesis in nebular theory British & World English

The theory that the solar and stellar systems were developed from a primeval nebula

Avogadro's law British & World English

A law stating that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules

Avogadro's hypothesis in Avogadro's law British & World English

A law stating that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules

Gaia hypothesis in Lovelock, James British & World English

(B.1919), English scientist; full name James Ephraim Lovelock. He is best known for the Gaia hypothesis, first presented by him in 1972 and discussed in several popular books, including Gaia (1979)

African Eve hypothesis in Eve hypothesis British & World English

The hypothesis (based on study of mitochondrial DNA) that modern humans have a common female ancestor who lived in Africa around 200,000 years ago

Riemann hypothesis in Riemann, Bernhard British & World English

(1826–66), German mathematician; full name Georg Friedrich Bernhard Riemann. He founded Riemannian geometry, which is of fundamental importance to both mathematics and physics. The Riemann hypothesis, about the complex numbers which are roots of a certain transcendental equation, remains an unsolved problem