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8 Words That Are Older Than You Think

Ph

Chemistry
1.

pH

Chemistry
1.
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.
1.
phot; phots.

ph.

1.
2.

P.H.

1.
Public Health.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web 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.
  • Ph has no fundamental meaning as a unit its official definition is a practical one.
  • Ph is a measurement of the concentration of hydrogen ions in a solution.
  • The efficacy of benzoic acid and benzoate is thus dependent on the Ph of the food.
  • Bicarbonate serves a crucial biochemical role in the Physiological Ph buffering system.
  • An increase in blood Ph, which is damaging to the internal organs.
  • When they metabolize the sugar, they create acids in the mouth, which lower its Ph value.
British Dictionary definitions for Ph

ph

abbreviation
1.
Philippines

pH

noun
1.
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

Chemical symbol
1.
phenyl group or radical

ph.

abbreviation
1.
phase
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Ph

pH

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

ph

now in English usually representing "f," originally it was the combination used by Romans to represent Greek letter phi (cognate with Sanskrit -bh-, Germanic -b-), which at first was an aspirated "p," later the same sound as German -pf-. But by 2c. B.C.E. had become a simple sound made by blowing through the lips (bilabial spirant).

Roman "f," like modern English "f," was dentilabial; by c.400, however, the sounds had become identical and in some Romanic languages (Italian, Spanish), -ph- regularly was replaced by -f-. This tendency took hold in Old French and Middle English, 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-Greek words in -f- began to appear confusedly in -ph-, though these forms generally have not survived.

Online Etymology Dictionary, © 2010 Douglas Harper
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Ph in Medicine

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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Ph in Science
pH
  (pē'āch')   
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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Ph in Culture
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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Ph in Technology

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

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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Related Abbreviations for Ph

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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