alveolus

noun
al·​ve·​o·​lus | \ al-ˈvē-ə-ləs How to pronounce alveolus (audio) \
plural alveoli\ al-​ˈvē-​ə-​ˌlī How to pronounce alveolus (audio) , -​(ˌ)lē \

Definition of alveolus

1 : a small cavity or pit: such as
a : a socket in the jaw for a tooth
b : a small air-containing compartment of the lungs in which the bronchioles terminate and from which respiratory gases are exchanged with the pulmonary capillaries
c : an acinus of a compound gland
d : a cell of a honeycomb

Examples of alveolus in a Sentence

Recent Examples on the Web But even when a patient is severely ill, some alveoli still function well. Olivia Carville, Bloomberg.com, 10 May 2020 This could explain how the alveoli fail to oxygenate the blood without the patient noticing the need to gasp for more air. Fox News, 28 Apr. 2020 These millions of alveoli are so soft, so gentle, that a healthy lung has almost no substance. oregonlive, 7 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'alveolus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of alveolus

1657, in the meaning defined at sense 1

History and Etymology for alveolus

New Latin, from Latin, diminutive of alveus cavity, hollow, from alvus belly, beehive; akin to Lithuanian aulys beehive, Greek aulos tube, flute

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Time Traveler for alveolus

Time Traveler

The first known use of alveolus was in 1657

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Cite this Entry

“Alveolus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alveolus. Accessed 16 Jun. 2021.

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More Definitions for alveolus

alveolus

noun
al·​ve·​o·​lus | \ al-ˈvē-ə-ləs How to pronounce alveolus (audio) \
plural alveoli\ -​ˌlī How to pronounce alveolus (audio) , -​(ˌ)lē How to pronounce alveolus (audio) \

Medical Definition of alveolus

: a small cavity or pit: as
a : a socket in the jaw for a tooth
b : 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 capillaries
c : an acinus of a compound gland
d : any of the pits in the wall of the stomach into which the glands open

More from Merriam-Webster on alveolus

Thesaurus: All synonyms and antonyms for alveolus

Britannica English: Translation of alveolus for Arabic Speakers

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