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A microorganism, especially a disease-causing bacterium; a minute life form (noun)
USA Today Rootonym clue · 7 letters · last seen October 1, 2026
Answer
MICROBE
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The Root
MICROmeans “small”
In a sentence: A mysterious MICROBE caused such a severe reaction that Tim needed hospitalization.
About this clue
The Rootonym clue “A microorganism, especially a disease-causing bacterium; a minute life form (noun)” has the answer MICROBE (7 letters), built on the root MICRO, which means “small”. See the full October 1, 2026 Rootonym puzzle for the other three words, or browse all Rootonym answers.
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