E

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does E mean? 

• E (noun)
  The noun E has 5 senses:

1. a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body

2. a radioactive transuranic element produced by bombarding plutonium with neutrons

3. the cardinal compass point that is at 90 degrees

4. the base of the natural system of logarithms; approximately equal to 2.718282...

5. the 5th letter of the Roman alphabet

  Familiarity information: E used as a noun is common.

 Dictionary entry details 

• E (noun)

Sense 1

Meaning:

A fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body

Classified under:

Nouns denoting substances

Synonyms:

E; tocopherol; vitamin E

Hypernyms ("E" is a kind of...):

antioxidant (substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides)

fat-soluble vitamin (any vitamin that is soluble in fats)

Hyponyms (each of the following is a kind of "E"):

alpha-tocopheral (a potent form of vitamin E obtained from germ oils or by synthesis)

Sense 2

Meaning:

A radioactive transuranic element produced by bombarding plutonium with neutrons

Classified under:

Nouns denoting substances

Synonyms:

atomic number 99; E; einsteinium; Es

Hypernyms ("E" is a kind of...):

metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)

Sense 3

Meaning:

The cardinal compass point that is at 90 degrees

Classified under:

Nouns denoting relations between people or things or ideas

Synonyms:

due east; E; east; eastward

Hypernyms ("E" is a kind of...):

cardinal compass point (one of the four main compass points)

Sense 4

Meaning:

The base of the natural system of logarithms; approximately equal to 2.718282...

Classified under:

Nouns denoting quantities and units of measure

Hypernyms ("e" is a kind of...):

transcendental number (an irrational number that is not algebraic)

Sense 5

Meaning:

The 5th letter of the Roman alphabet

Classified under:

Nouns denoting communicative processes and contents

Hypernyms ("E" is a kind of...):

alphabetic character; letter; letter of the alphabet (the conventional characters of the alphabet used to represent speech)

Holonyms ("E" is a member of...):

Latin alphabet; Roman alphabet (the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe)

 Context examples 

The study also found that a novel therapeutic approach that specifically targets the E. faecalis strain lessened alcohol-associated liver disease in mice.

(Bacteriophage therapy may ease severity of alcoholic hepatitis, National Institutes of Health)

Instead of that he took two tickets for the theatre, escorted his fiancée halfway there, and then suddenly disappeared.

(His Last Bow, by Sir Arthur Conan Doyle)

When a voltage was applied to the neuromorphic network, it appeared to “struggle” to find optimal current pathways (i.e., the most electrically efficient pathways).

(Neuromorphic Metallic Nanowire Network Shows Human Brain-Like Functions, The Titi Tudorancea Bulletin)

The scientists measured the amount of an antibody called sesame-specific immunoglobulin E (sIgE) in the blood of these 88 children.

(17% of Food-Allergic Children Have Sesame Allergy, National Institutes of Health)

A secreting cell that lines an acinus (i.e. a small sac or sac-like structure).

(Acinar Cell, NCI Thesaurus)

Well, ’e’s a terror, that’s all.

(Rodney Stone, by Sir Arthur Conan Doyle)

Samples from an area mined by Oregon Mineral Technologies (OMT) proved active against a broad spectrum of bacteria, including methicillin-resistant S. aureus (MRSA) and extended-spectrum beta-lactamase-resistant E. coli (ESBL).

(New answer to MRSA, other 'superbug' infections: clay minerals?, NSF)

James E. Crowe, Jr., M.D., of Vanderbilt University Medical Center, Nashville, Tennessee, and Ian A. Wilson, D. Phil., of The Scripps Research Institute, San Diego, California, led the team.

(Human antibody reveals hidden vulnerability in influenza virus, National Institutes of Health)

The treated material is also ideal for food packaging, where it could stop the accidental transfer of bacteria such as E. coli, Salmonella and listeria from raw chicken, meat and other foods.

(Scientists Create Superbug-Resistant Self-Cleaning Surface, The Titi Tudorancea Bulletin)

The new method works by adding an E. coli bacteria into the genome of the corn plant, which then causes the methionine production in the plants leaves.

(US Researchers Genetically Modify Corn to Boost Nutritional Value, VOA News)