Meaning & use
Picograms
Last updated
Units of mass equal to one trillionth (10⁻¹²) of a gram, often used to measure extremely small quantities such as trace pollutants or DNA.
See it in a sentence
The lab detected contaminants at concentrations of just a few picograms per liter.
Forensic analysts can now extract usable DNA from samples weighing only picograms.
A note on using this word
The prefix 'pico-' denotes a trillionth in the metric system, making the picogram one of the smallest units routinely used in chemistry and biology.
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