Wiktionary
picogram
n. A unit of mass equal to 0.000 000 000 001 grams. Symbol: pg
Usage examples of "picogram".
Femtograms, picograms, nanograms of matter coalesced in a space too small to measure.
How can this living disorder coexist with the fantasy world of nanosecond measurements and picogram quantities?
I only had a few picograms left, so I had to make every run of my experiment count.