1 Definition in the Yahoo! Kids Dictionary
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"KIDS HOME STUDY REFERENCE DICTIONARY HOME WORD: hypothesize

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hy·poth·e·size  audio 
(h-pth-sz)  See the pronunciation key 

VERB:
hy·poth·e·sized, hy·poth·e·siz·ing, hy·poth·e·siz·es
VERB:
tr.
To assert as a hypothesis.
VERB:
intr.
To form a hypothesis.

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