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pH

Chemistry.
the symbol for the logarithm of the reciprocal of hydrogen ion concentration in gram atoms per liter, used to express the acidity or alkalinity of a solution on a scale of 0 to 14, where less than 7 represents acidity, 7 neutrality, and more than 7 alkalinity.

ph

Optics.
phot; phots.

ph.

P.H.

Public Health.
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Collins
World English Dictionary
ph
 
the internet domain name for
Philippines

pH
 
n
potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7

Ph
 
the chemical symbol for
phenyl group or radical

ph.
 
abbreviation for
phase

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

pH
1909, from Ger. PH, introduced by S.P.L. Sörensen, from P, for Ger. Potenz "potency, power" + H, symbol for the hydrogen ion that determines acidity or alkalinity.

ph
consonantal digraph, now usually representing "f," originally the combination used by Romans to represent Gk. letter phi (cognate with Skt. -bh-, Gmc. -b-), which at first was an aspirated "p," later the same sound as Ger. -pf-, but by 2c. B.C.E. had become a simple sound made by blowing through the
lips (bilabial spirant). Roman "f," like modern Eng. "f," was dentilabial; by c.400, however, the sounds had become identical and in some Romanic languages (It., Sp.), -ph- regularly was replaced by -f-. This tendency took hold in O.Fr. and M.E., but with the revival of classical learning the words subsequently were altered back to -ph- (except fancy and fantastic), and due to zealousness in this some non-Gk. words in -f- began to appear in -ph-, though these forms generally have not survived.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

pH (pē'āch')
n.
A measure of the acidity or alkalinity of a solution, numerically equal to 7 for neutral solutions, increasing with increasing alkalinity and decreasing with increasing acidity. The pH scale commonly in use ranges from 0 to 14.

PH or P.H.
abbr.
public health

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
pH   (pē'āch')  Pronunciation Key 
A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14. Neutral solutions (such as pure water) have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7. The pH of lemon juice is 2.4; that of household ammonia is 11.5. The normal pH for human blood is 7.4. ◇ The letters pH stand for potential of hydrogen, since pH is effectively a measure of the concentration of hydrogen ions (that is, protons) in a substance. The pH scale was devised in 1923 by Danish biochemist Søren Peter Lauritz Sørensen (1868-1969).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
pH [(pee-aych)]

In chemistry, a measure of the strength of an acid or a base. A neutral solution has a pH of 7; acids a pH between 0 and 7; bases a pH from 7 to 14. Specially treated strips of paper (see litmus), or more precise instruments, may be used to measure pH.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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FOLDOC
Computing Dictionary

PH definition

tool
The tool for looking up people in Eudora on the Macintosh. Equivalent to Unix's finger service.
(1995-03-31)

pH definition


Parallel Haskell

ph definition

networking
The country code for the Philippines.
(1999-01-27)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
pH
potential of hydrogen (0 to 14 scale—0, very acidic; 7, neutral; 14, very alkaline)
Ph
Philippians
PH
  1. penthouse

  2. public health

  3. Purple Heart

ph.
  1. phase

  2. phone number

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for pH
An exploration of admissibility criteria for testimony in brainwashing trials,
  ph.
This relatively acidic ph level prevents the growth of many bacteria.
Mailman school of public health offers the mph, drph, and ph.
Ph is the measure of the acidity or alkalinity of a solution.
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