epi-

prefix
variants: or ep-

Definition of epi-

1 : upon epiphyte : besides epiphenomenon : attached to epididymis : over epicenter : outer epiblast : after epigenesis
2a : chemical entity related to (such) another epimer
b : chemical entity distinguished from (such) another by having a bridge connection epichlorohydrin

History and Etymology for epi-

Latin, from Greek, from epi on, at, besides, after; akin to Old English eofot crime

Keep scrolling for more

Learn More about epi-

Statistics for epi-

Cite this Entry

“Epi-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epi-. Accessed 8 Aug. 2020.

Comments on epi-

What made you want to look up epi-? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!