Avogadro's number

WordReference Random House Unabridged Dictionary of American English © 2025

A′voga′dro's num′ber, [Chem.]

1. Chemistry the constant, 6.02 × 10²³, representing the number of atoms in a gram atom or the number of molecules in a gram molecule. Symbol: N Also called A′voga′dro con′stant. Cf. Loschmidt's number.

• see Avogadro's law 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::

Avogadro's constant, Avogadro constant, Avogadro's number noun

1. the number of atoms or molecules in a mole of a substance, equal to 6.022 52 × 10²³