one billionth (10–9) of a gram
Symbol: ng
WordReference Random House Unabridged Dictionary of American English © 2025
nan•o•gram
(nan′ə gram′, nā′nə-),USA pronunciation n.
- Weights and Measuresone billionth of a gram. Abbr.: ng
- nano- + -gram2 1950–55
Collins Concise English Dictionary © HarperCollins Publishers::
'nanogram' also found in these entries (note: many are not synonyms or translations):