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English definition of “nanogram”

nanogram

noun [C]     /ˈnæn.ə.ɡræm/ US  /ˈnæn.əˌɡræm/ specialized
0.000,000,001 of a gramMeasurements of weight and mass
(Definition of nanogram noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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