Avogadro's number

noun Chemistry.

the constant, 6.022 × 1023, representing the number of atoms, molecules, or ions in one mole of a substance. Symbol: NCompare gram-atom, gram molecule.

Compare Loschmidt's number.

Origin of Avogadro's number

First recorded in 1925–30; see origin at Avogadro's law

Also called Avogadro constant.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

avogadro's number in Medicine

Avogadro's number

n.

The number of molecules in a mole of a substance, approximately 6.0225 X 1023.Avogadro's constant

avogadro's number in Science

Avogadro's number

The number of atoms or molecules in a mole of a substance, approximately 6.0225 X 1023. It is based on the number of carbon atoms in 12 grams of carbon 12.