Medical Dictionary

Avogadro's law

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

Biographical Note for avogadro's law

Avogadro play \ˌav-ə-ˈgäd-(ˌ)rō, ˌäv-\, Count Amedea (1776–1856), Italian physicist and chemist. Avogadro is considered one of the founders of physical chemistry. In 1811, he made his outstanding scientific contribution: his hypothesis, now accepted as a scientific law, that equal volumes of gases at the same temperature and pressure contain the same number of molecules. This hypothesis was a landmark in 19th-century chemistry and is one of the basic concepts of modern chemistry.