variants: or before vowels all-

Definition of allo-

1 : other : different : atypical allogamous allotrope
2 : isomeric form or variety of (a specified chemical compound) allopurinol
3 : being one of a group whose members together constitute a structural unit especially of a language allophone

History and Etymology for allo-

borrowed from Greek, combining form from állos "other, another" — more at else entry 1

Learn More About allo-

Dictionary Entries Near allo-

all-nighter

allo-

alloantibody

See More Nearby Entries 

Statistics for allo-

Cite this Entry

“Allo-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/allo-. Accessed 17 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Great Words for Scrabble

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

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!