The definition of a hypothesis is an unproven theory or statement.(noun)
An example of hypothesis is the theory of evolution.
See hypothesis in Webster's New World College Dictionary
noun pl. hypotheses
Origin: Gr, groundwork, foundation, supposition < hypotithenai, to place under < hypo-, under + tithenai, to place: see hypo- & do
See hypothesis in American Heritage Dictionary 4
noun pl. hy·poth·e·ses (-sēzˌ)
Origin: Latin, subject for a speech
Origin: , from Greek hupothesis, proposal, supposition
Origin: , from hupotithenai, hupothe-, to suppose
Origin: : hupo-, hypo-
Origin: + tithenai, to place; see dhē- in Indo-European roots.
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