Definition of "clumped" [clumped]

• Simple past tense and past participle of clump. (verb)

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• "QUESTION: Have any of the investigators told you whether the spores were kind of clumped together in these little clumps or whether they were in the defined powder that they would be manufactured in for use in a weapon?"
• "The currently applied method for cryopreservation of "clumped" iPS cells is not standardized and has a low efficiency: the survival rates after thawing are lower than 10% and the reproducibility of the results is very low."
• "He said streets will be "clumped" together as best possible and noted the city will work with the contractor to determine their availability."