1. the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000); [syn: Avogadro's number, Avogadro number]
WordNet (r) 3.0 (2006):
Avogadro number
n 1: the number of molecules in a mole of a substance
(approximately 602,250,000,000,000,000,000,000) [syn:
Avogadro's number, Avogadro number]