Avogadro's law

noun

Avo·ga·dro's law | \ ˌav-ə-ˌgäd-(ˌ)rōz-

, -ˌgad-\

Medical Definition of Avogadro's law

: a law in chemistry: equal volumes of all gases at the same temperature and pressure contain equal numbers of molecules

— called also Avogadro's hypothesis