epsilon

[ ep-suh-lon, -luh n or, esp. British, ep-sahy-luh n ]
/ ˈɛp səˌlɒn, -lən or, esp. British, ɛpˈsaɪ lən /
|

noun

the fifth letter of the Greek alphabet (E, ε).
the consonant sound represented by this letter.
Mathematics. an arbitrarily small quantity, used to indicate that a given quantity is small, or close to zero.

Nearby words

  1. epping,
  2. epping forest,
  3. epr,
  4. eprom,
  5. eps,
  6. epsilon-delta,
  7. epsilon-neighborhood,
  8. epsom,
  9. epsom and ewell,
  10. epsom salt

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 Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for epsilon


British Dictionary definitions for epsilon

epsilon

/ (ˈɛpsɪˌlɒn, ɛpˈsaɪlən) /

noun

the fifth letter of the Greek alphabet (Ε, ε), a short vowel, transliterated as e

Word Origin for epsilon

Greek e psilon, literally: simple e

Epsilon

/ (ˈɛpsɪˌlɒn, ɛpˈsaɪlən) /

noun

(foll by the genitive case of a specified constellation) the fifth brightest star in a constellationEpsilon 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

Word Origin and History for epsilon

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

Medicine definitions for epsilon

epsilon

[ ĕpsə-lŏn′, -lən ]

n.

The fifth letter of the Greek alphabet.
The fifth in a series.

adj.

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