PH Definition

pēāch
noun
The degree of acidity or alkalinity of a solution; it is the logarithm of the reciprocal of the hydrogen-ion concentration in gram equivalents per liter of solution (Ex: .0000001 gram atom of hydrogen ion per liter yields a numeric reciprocal of ten million, the log of ten million equals 7, therefore 7 is the pH): a pH of 7, the value for pure distilled water, is regarded as neutral; pH values from 7 to 0 indicate increasing acidity and from 7 to 14 indicate increasing alkalinity.
Webster's New World
Synonyms:
  • pH scale
abbreviation
Phase.
Webster's New World
Penthouse.
American Heritage

Phot.

Webster's New World
Philippians.
Webster's New World
Public health.
American Heritage Medicine

Origin of PH

  • p(otential of) h(ydrogen)

    From American Heritage Dictionary of the English Language, 5th Edition

PH Sentence Examples

  • The plant formation may be designated in technical language ph the termination -ion added to a stem denoting the habitat.

  • He graduated at Columbia College in 1882, was a graduate fellow in philosophy there from 1882 to 1884, when he took the degree of Ph.

  • U1 - U', leaf-traces, numbered according to the phyllotaxis, It 5 belonging to the lowest leaf of the five; ph, a group of primary phloem; pd, periderm, formed from pericycle.

  • The optimum pH 6.0 to 6.5 range is also critical to feed efficiency.

  • It is also advisable when growing in rockwool slab culture to flush the salt out every 2 weeks with pH adjusted plain water.

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