Simple past tense and past participle of hypothesize.(verb)
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Use "hypothesized" in a sentence
"In the 1980s, the oceanographer John Martin hypothesized that large amounts of oceanic iron may have produced giant plankton blooms in the past, and therefore chilled the atmosphere by removing carbon dioxide."
"This NASA story, about how the Moon bears witness to the early history of the solar system, and could tell us whether "extinction events" caused by heavy bombardments from outer space really recur every 26 million years on Earth as some have hypothesized, is headlined "The Moon is a harsh witness.""
"Darwin hypothesized that there must be a moth out there with a 12″ tongue that had evolved alongside this flower."