Avogadro's number

noun

Avo·​ga·​dro's number ˌa-və-ˈgä-(ˌ)drōz- How to pronounce Avogadro's number (audio)
ˌä-və-,
-ˈga- How to pronounce Avogadro's number (audio)
: the number 6.022 × 1023 indicating the number of atoms or molecules in a mole of any substance

called also Avogadro number

Examples of Avogadro's number in a Sentence

Recent Examples on the Web There is of course Mole Day (10/23) to commemorate Avogadro's number, which is huge (on the order of 1023) and hugely important in physics. Rhett Allain, WIRED, 14 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'Avogadro's number.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Count Amedeo Avogadro

First Known Use

1904, in the meaning defined above

Time Traveler
The first known use of Avogadro's number was in 1904

Dictionary Entries Near Avogadro's number

Cite this Entry

“Avogadro's number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Avogadro%27s%20number. Accessed 31 Oct. 2024.

Medical Definition

Avogadro's number

noun
variants or Avogadro number
: the number 6.023 × 1023 indicating the number of atoms or molecules in a mole of any substance compare avogadro's law
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