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

Na

symbol

Definition of Na

  1. sodium



Origin and Etymology of na

New Latin natrium

Other Chemical Engineering Terms


NA

abbreviation

Definition of NA

  1. 1 national association

  2. 2 no account

  3. 3 North America

  4. 4 not applicable

  5. 5 not available




Medical Dictionary

Na

symbol

Medical Definition of Na

  1. sodium




NA

abbreviation

Medical Definition of NA

  1. 1Narcotics Anonymous

  2. 2Nomina Anatomica

  3. 3numerical aperture

  4. 4nurse's aide




Learn More about na

  1. Medical Dictionary: Definition of Na Britannica.com: Encyclopedia article about Na


Seen and Heard

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

WORD OF THE DAY

of striking ability or excellence

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

two-chairs-on-a-pier-by-the-ocean-in-summer

Which of the following words means “of or relating to summer”?

brumal hiemal estival vernal
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