noun
- a unit of mass equal to one billionth of a gram
Usage: scientific; metric system
Examples
- The scientist measured just 50 nanograms of the protein sample.
- DNA analysis can detect substances in nanogram quantities.
- The drug concentration was expressed in nanograms per milliliter.
- Modern instruments can weigh materials down to the nanogram level.
- The contamination was measured at 2.5 nanograms per cubic meter.
- Forensic labs work with nanogram amounts of evidence.