Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

Au

abbreviation

Definition of Au

  1. author




2

Au

symbol

Definition of Au

  1. gold



Origin and Etymology of au

Latin aurum

Other Chemical Engineering Terms


AU

abbreviation

Definition of AU

  1. 1 angstrom unit

  2. 2 astronomical unit




Medical Dictionary

Au

symbol

Medical Definition of Au

  1. gold



Origin and Etymology of au

L aurum


AU

abbreviation

Medical Definition of AU

  1. 1angstrom unit

  2. 2antitoxin unit

  3. 3[Latin aures unitas] both ears—used especially in audiology and in writing prescriptions




Learn More about au


Seen and Heard

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

WORD OF THE DAY

mysterious, holy, or spiritual

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

rebellion megillah interruption torrent
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ