Share this entry

Share this page

epsilon

Line breaks: ep¦si|lon
Pronunciation: /ˈɛpsɪlɒn
 
, ɛpˈsʌɪlɒn
 
/

Definition of epsilon in English:

noun

1The fifth letter of the Greek alphabet (Ε, ε), transliterated as ‘e’.
1.1 [as modifier] Denoting the fifth in a series of items, categories, etc. epsilon and gamma globins diverged about 100 million years ago
1.2 (Epsilon) [followed by Latin genitive] Astronomy The fifth star in a constellation: Epsilon Carinae
More example sentences
  • The most likely destinations are the stars closest to Earth, such as Alpha Centauri and Proxima Centauri, Tau Ceti, and Epsilon Eridani.
  • The star Epsilon Eridani, 10 light years from Earth, was then found to have exactly the disc clumps predicted by the computer models.
  • The University of Texas team found a planet similar in size to Jupiter about 10.5 light years away from Earth orbiting the star Epsilon Eridani, a star very similar to the sun.

symbol

Back to top  

Origin

Greek, 'bare or simple E', from psilos 'bare'.

Words that rhyme with epsilon

nylonOrlon

Definition of epsilon in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day tenebrous
Pronunciation: ˈtɛnɪbrəs
adjective
dark; shadowy or obscure