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epsilon

[ep-suh-lon, -luh n or, esp. British, ep-sahy-luh n] /ˈɛp səˌlɒn, -lən or, esp. British, ɛpˈsaɪ lən/
noun
1.
the fifth letter of the Greek alphabet (E, ε).
2.
the consonant sound represented by this letter.
3.
Mathematics. an arbitrarily small quantity, used to indicate that a given quantity is small, or close to zero.
Origin of epsilon
< Greek è psīlón bare, simple e (as opposed to diphthongal spellings which in later Gk represented the same sound)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for epsilon
  • With this the annoying epsilon-delta limit argument is replaced by simple algebra.
British Dictionary definitions for epsilon

epsilon

/ˈɛpsɪˌlɒn; ɛpˈsaɪlən/
noun
1.
the fifth letter of the Greek alphabet (Ε, ε), a short vowel, transliterated as e
Word Origin
Greek e psilon, literally: simple e

Epsilon

/ˈɛpsɪˌlɒn; ɛpˈsaɪlən/
noun
1.
(foll by the genitive case of a specified constellation) the fifth brightest star in a constellation: Epsilon Aurigae
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 epsilon
n.

from Greek, literally e psilon "bare -e-, -e- and nothing else," in contradistinction to the diphthong -ai-, which has the same sound. Greek psilon "smooth, simple" is of uncertain origin.

Online Etymology Dictionary, © 2010 Douglas Harper
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epsilon in Medicine

epsilon ep·si·lon (ěp'sə-lŏn', -lən)
n.


  1. Symbol ε The fifth letter of the Greek alphabet.

  2. The fifth in a series.

adj.
  1. Of or relating to the fifth member of a particular ordered set.

  2. Relating to or characterizing a polypeptide chain that is one of five types of heavy chains present in immunoglobins.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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epsilon in Technology
language
A macro language with high level features including strings and lists, developed by A.P. Ershov at Novosibirsk in 1967. EPSILON was used to implement ALGOL 68 on the M-220.
["Application of the Machine-Oriented Language Epsilon to Software Development", I.V. Pottosin et al, in Machine Oriented Higher Level Languages, W. van der Poel, N-H 1974, pp. 417-434].
[Jargon File]
(1995-05-10)

1. The fifth letter of the Greek alphabet.
2. (From the Hungarian mathematician Paul Erdos) A very small, insignificant, or negligible quantity of something.
The use of epsilon is from the epsilon-delta method of proof in differential calculus.
(2001-07-06)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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