Definition of quadrivalency in English:

quadrivalency

Pronunciation /ˌkwɒdrɪˈveɪlənsi/ /ˌkwɒdrɪˈveɪlə(ə)nsi/

noun

Chemistry
  • Tetravalence.

Origin

Early 20th century; earliest use found in Journal of the Chemical Society. From quadri- + -valency, after quadrivalent.