Symbol, Chemistry.

E, e

[ ee ]
/ i /

noun, plural E's or Es, e's or es.

the fifth letter of the English alphabet, a vowel.
any spoken sound represented by the letter E or e, as in met, meet, mere, etc.
something having the shape of an E.
a written or printed representation of the letter E or e.
a device, as a printer's type, for reproducing the letter E or e.


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a plural suffix occurring in loanwords from Greek: Hyades.

Origin of -es

From the Greek suffix -es



variant of -s2 in verbs ending in s, z, ch, sh, or post-consonantal y: passes; buzzes; pitches; dashes; studies.



variant of -s3 in nouns ending in s, z, ch, sh, or post-consonantal y, and in nouns in f with v in the plural: losses; fuzzes; riches; ashes; babies; sheaves. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for es

British Dictionary definitions for es


the internet domain name for



the chemical symbol for



abbreviation for

El Salvador (international car registration)



for nouns ending in ch, s, sh, z, postconsonantal y, for some nouns ending in a vowel, and nouns in f with v in the plural, a variant of -s 1 ashes; heroes; calves
for verbs ending in ch, s, sh, z, postconsonantal y, or a vowel, a variant of -s 1 preaches; steadies; echoes
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

Medicine definitions for es


The symbol for the elementeinsteinium

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for es


The symbol for einsteinium.


[ ē ]

An irrational number, with a numerical value of 2.718281828459.... It is mathematically defined as the limit of (1 + 1n)n as n grows infinitely large. It is the base of natural logarithms and has many applications in mathematics, especially in expressions involving exponential growth and decay.


The symbol for energy.
The symbol for modulus of elasticity.


[ īn-stīnē-əm ]


A synthetic, radioactive metallic element of the actinide series that is usually produced by bombarding plutonium or another element with neutrons. It was first isolated in a region near the explosion site of a hydrogen bomb. Its longest-lived isotope is Es 254 with a half-life of 276 days. Atomic number 99; melting point 860°C. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.