[ep-suh-lon, -luh n or, esp. British, ep-sahy-luh n]
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.
Origin of epsilon
< Greek è psīlón bare, simple e (as opposed to diphthongal spellings which in later Gk represented the same sound)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for epsilon
Historical Examples of epsilon
I dreamed they all committed suicide because Epsilon was too good for them.
And goeth from Epsilon down to Mu: the reference is to some numbering on the parchment.
A pilot comes back from Epsilon Eridani, for example, and insists on giving everybody left-handed salutes.
Epsilon Lyr, which is the northern one of these two stars, may be used as a test of keen eyesight.
The most southerly star in this pentagon is known as Epsilon Botes and is one of the finest double stars in the heavens.
British Dictionary definitions for epsilon
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
(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
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
The fifth letter of the Greek alphabet.
The fifth in a series.
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.