What do a.m. and p.m. stand for?


[prin-sip-ee-uh m] /prɪnˈsɪp i əm/
noun, plural principia
[prin-sip-ee-uh] /prɪnˈsɪp i ə/ (Show IPA)
a principle.
Origin of principium
1575-85; < Latin prīncipium literally, that which is first, equivalent to prīncip- (see prince) + -ium -ium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for principia
  • Much of principia mathematica included in logic was not logic for quine.
  • This contained the beginnings of the laws of motion that would inform the principia.
  • With the principia, newton became internationally recognised.
  • Nevertheless, some structure is indicated in principia discordia.
  • It features prominently on several pages of the principia discordia.
  • The principia discordia contains the law of eristic escalation.
British Dictionary definitions for principia


noun (pl) -ia (-ɪə)
(usually pl) a principle, esp a fundamental one
Word Origin
C17: Latin: an origin, beginning
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 principia

"fundamental principles," plural of Latin principium "beginning, origin" (see principle (n.)). Especially as the short form of the title of Newton's book (published 1687).

Online Etymology Dictionary, © 2010 Douglas Harper
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