“bsurface”

We have one entry that includes the term bsurface.

hepatitis B surface antigen

noun

: an antigen that is usually a surface particle from the hepatitis B virus and that is found circulating in the blood serum especially of infected individuals —abbreviation HBsAg

See the full definition

Word of the Day

Listen to the pronunciation of expunge

See Definitions and Examples »

Test Your Vocabulary

What did you just call me?

  • brown chihuahua sitting on the floor with squinting eyes looking at the camera
  • Before we went to her house, Hannah told us her aunt was a flibbertigibbet.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.

Pick the best words!

PLAY
Love words? Need even more definitions?

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

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
illustration of alice and tweedledee and tweedledum
Guess the Literary Image We show you the art, you guess the literary work....
See All