[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)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for epsilon
I dreamed they all committed suicide because Epsilon was too good for them.Competition
And goeth from Epsilon down to Mu: the reference is to some numbering on the parchment.Introduction to Robert Browning
A pilot comes back from Epsilon Eridani, for example, and insists on giving everybody left-handed salutes.Next Door, Next World
Robert Donald Locke
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.
- the fifth letter of the Greek alphabet (Ε, ε), a short vowel, transliterated as e
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.