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ppb

1 American  
Or p.p.b.
  1. (in publishing) paper, printing, and binding.

  2. parts per billion.


PPB 2 American  
Or P.P.B.
  1. (in publishing) paper, printing, and binding.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The fastest growth occurred in 2021, when methane levels increased by nearly 18 ppb.

From Science Daily • Feb. 10, 2026

The state of California considers a long-term average of 7 ppb, across several months, to be dangerous.

From Los Angeles Times • Dec. 16, 2024

In April of this year, methane concentrations reached a record high of 1,931 parts per billion — an increase of 11 ppb compared with the previous year.

From Los Angeles Times • Sep. 10, 2024

In that case the study says the high end of ozone measurements would -- on average -- go up by more than 2.3 ppb.

From Science Daily • Jun. 5, 2024

Binary Mode ppb iot 6 For each In-Out Transfer instruction one line of tape is punched.

From Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) October, 1960 by Digital Equipment Corporation