Ppb is a synonym of nanouno.
Nanouno is likely misspelled.
Nanouno has no English definition.
As an initialism PPB is
parts per billion.
nanouno
Not English
Nanouno has no English definition. It may be misspelled.
English words similar to 'nanouno':
nimono
ppb
English
Initialism
(Initialism)
(head)
parts per billion