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American Dictionary of the English Language

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Hypothesis


HYPOTH'ESIS, noun [Latin from Gr. a supposition; to suppose.]

1. A supposition; a proposition or principle which is supposed or taken for granted, in order to draw a conclusion or inference for proof of the point in question; something not proved, but assumed for the purpose of argument.

2. A system or theory imagined or assumed to account for what is not understood.