ppb

¹ American  

Or p.p.b.

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

2. parts per billion.

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PPB ² American  

Or P.P.B.

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

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Example Sentences

Measurements show that atmospheric methane rose by 55 parts per billion between 2019 and 2023, reaching a record level of 1921 ppb in 2023.

From Science Daily • Feb. 10, 2026

Officials have found that people can detect hydrogen sulfide at levels from 0.05 ppb to 30 ppb, though it’s not exactly clear the levels at which symptoms occur, and this likely varies by person.

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