# 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.

/ˈɛpsɪˌlɒn; ɛpˈsaɪlən/

**noun**

1.

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

/ˈɛpsɪˌlɒn; ɛpˈsaɪlən/

**noun**

1.

(foll by the genitive case of a specified constellation) the fifth brightest star in a constellation: Epsilon Aurigae

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.

epsilon ep·si·lon (ěp’sə-lŏn’, -lən)

n.

**adj.**

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)

Tagged: e

Read Also:

- Epsilon-delta
[ep-suh-lon-del-tuh, -luh n- or, esp. British, ep-sahy-luh n-] /ˈɛp səˌlɒnˈdɛl tə, -lən- or, esp. British, ɛpˈsaɪ lən-/ adjective, Mathematics. 1. of or relating to a method or proof in calculus involving arbitrarily small numbers.

- Epsilon-neighborhood
[ep-suh-lon-ney-ber-hoo d, -luh n- or, esp. British, ep-sahy-luh n-] /ˈɛp səˌlɒnˌneɪ bərˌhʊd, -lən- or, esp. British, ɛpˈsaɪ lən-/ noun, Mathematics. 1. the set of all points whose distance from a given point is less than some specified number epsilon.

- Epsilon squared
jargon A quantity even smaller than epsilon, as small in comparison to epsilon as epsilon is to something normal; completely negligible. If you buy a supercomputer for a million dollars, the cost of the thousand-dollar terminal to go with it is epsilon, and the cost of the ten-dollar cable to connect them is epsilon squared. […]

- Epsimone
Concurrent simulation language derived from Simone. “EPSIMONE Manual”, J. Beziin et al, Pub Int No 90, IRISA, Sept 1978.