Avogadro's number
noun
Avo·ga·dro's number
ˌa-və-ˈgä-(ˌ)drōz-
ˌä-və-,
-ˈga-
: the number 6.022 × 1023 indicating the number of atoms or molecules in a mole of any substance
called also Avogadro number
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Merriam-Webster unabridged
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