ppb

¹

or p.p.b.

1. (in publishing) paper, printing, and binding.
2. parts per billion.

PPB

²

or P.P.B.

1. (in publishing) paper, printing, and binding.

Example Sentences

So long as detected levels of carbendazim are low enough, in the range of 10 to 35 ppb, they can stay for sale.

From The Daily Beast