Avogadro's constant
Concise Oxford English Dictionary © 2008 Oxford University Press:
Avogadro's constant /ˌavə(ʊ)ˈgɑːdrəʊz/ (also Avogadro's number)
▶noun Chemistry the number of atoms or molecules in one mole of a substance, equal to 6.023 × 1023.
– origin named after the Italian physicist A. Avogadro (1776–1856).
'Avogadro's constant' also found in these Oxford entries:

