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zeroth

[zeer-ohth] /ˈzɪər oʊθ/
adjective
1.
coming in a series before the first:
the zeroth level of energy.
Origin
1895-1900
1895-1900; zero + -th1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for zeroth
  • The output is again the zeroth order reflected beam off the grating.
  • It is positive definite and conserves the zeroth spatial tracer moment.
British Dictionary definitions for zeroth

zeroth

/ˈzɪərəʊð/
adjective
1.
denoting a term in a series that precedes the term otherwise regarded as the first term
Word Origin
C20: from zero + -th²
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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zeroth in Technology
jargon
First.
Since zero is the lowest value of an unsigned binary integer, which is one of the most fundamental types in programming and hardware design, it is often natural to count from zero rather than one, especially when the integer is actually an index, as in hardware addressing or C and Lisp's 0-based indexing of arrays.
Hackers and computer scientists often like to call the first chapter of a publication "Chapter 0", especially if it is of an introductory nature (one of the classic instances was in the First Edition of K&R). In recent years this trait has also been observed among many pure mathematicians (who have an independent tradition of numbering from 0).
Zero-based numbering tends to reduce fencepost errors, though it cannot eliminate them entirely.
Logically, the next item after the zeroth should be the "oneth" but this is never used.
[Jargon File]
(1997-12-07)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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