Akademik

nanogram

One-billionth of a gram (10⁻⁹ g).

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nano·gram or chiefly Brit nano·gramme 'nan-ə-.gram n one billionth of a gram abbr. ng

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nano·gram (ng) (nanґo-gram) one billionth (10⁻⁹) of a gram.

Medical dictionary. 2011.