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

Medical Dictionary

alveolus

play
noun al·ve·o·lus \al-ˈvē-ə-ləs\

Medical Definition of alveolus

plural al·ve·o·li \-ˌlī, -(ˌ)lē\play play

  1. :  a small cavity or pit: asa:  a socket in the jaw for a toothb:  any of the small thin-walled air-containing compartments of the lung that are typically arranged in saclike clusters into which an alveolar duct terminates and from which respiratory gases are exchanged with the pulmonary capillariesc:  an acinus of a compound glandd:  any of the pits in the wall of the stomach into which the glands open



Illustration of alveolus


Learn More about alveolus


Seen and Heard

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

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

100 pounds 2.2 pounds 16.96 pounds 196.5 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ