pH

noun

\ ˈpē-ˈāch

Definition of pH

(Entry 1 of 2)

: a measure of acidity and alkalinity of a solution that is a number on a scale on which a value of 7 represents neutrality and lower numbers indicate increasing acidity and higher numbers increasing alkalinity and on which each unit of change represents a tenfold change in acidity or alkalinity and that is the negative logarithm of the effective hydrogen-ion concentration or hydrogen-ion activity in gram equivalents per liter of the solution also : the condition represented by a pH number

abbreviation

Definition of PH (Entry 2 of 2)

1 pinch hit

2 public health

3 Purple Heart

Example Sentences Phrases Containing pH Learn More About pH

Examples of pH in a Sentence

Recent Examples on the Web: Noun Designed to calm, balance, and soothe, their post-shave balm serves to rebalance the natural pH of the skin after a rigorous shave. — The Salt Lake Tribune, 12 May 2022 Plastic in soil can increase the pH and lower the microbial activity that keeps soil healthy and nutrient-rich. — Clarisa Diaz, Quartz, 11 Apr. 2022 All Native body washes use citric acid to support your skin’s pH and natural biome, as well as coconut oil to moisturize. — Grooming Playbook, The Salt Lake Tribune, 7 Apr. 2022 By comparison, normal drinking water has a pH around 7. — Christine Condon, baltimoresun.com, 16 Sep. 2021 The product’s fine particles perform the dual function of both exfoliating and cleansing your face, removing dirt effectively without disturbing the skin’s pH balance. — Grooming Playbook, The Salt Lake Tribune, 7 Apr. 2022 Lastly, conditions in our gut promote or suppress certain species, as do soil conditions like pH and oxygenation. — Miri Talabac, Baltimore Sun, 23 Mar. 2022 The actress proudly held the Obagi Medical Nu-Derm Face Toner to the camera, and expertly swiped it across her face to balance her skin's pH levels and remove impurities and dead skin. — Jennifer Chan, PEOPLE.com, 7 Mar. 2022 When your skin's pH is off balance, some of the side effects can include things like redness, dryness, flaking skin, and overall irritation. — Tamim Alnuweiri, Health.com, 19 Jan. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pH.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.