Collins Concise English Dictionary © HarperCollins Publishers::

hypothesis /haɪˈpɒθɪsɪs/ n ( pl -ses / -ˌsiːz/)
  1. a suggested explanation for a group of facts or phenomena, either accepted as a basis for further verification (working hypothesis) or accepted as likely to be true
  2. an assumption used in an argument without its being endorsed; a supposition
Etymology: 16th Century: from Greek, from hupotithenai to propose, suppose, literally: put under; see hypo-, thesis

hyˈpothesist n

hypothesize, hypothesise /haɪˈpɒθɪˌsaɪz/ vb
  1. to form or assume as a hypothesis

hyˈpotheˌsizer, hyˈpotheˌsiser n

'hypothesise' also found in these entries:
In the English description:

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