quadrivalencyn.
/ˌkwɒdrᵻˈveɪlənsi/, /ˌkwɒdrᵻˈveɪln̩si/, U.S. /ˌkwɑdrəˈveɪlənsi/ Chemistry.
= tetravalence n. at tetravalent adj. Derivatives.
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the world > matter > chemistry > valency > [noun] > valency of four
quadrivalency1905
1905 Jrnl. Chem. Soc. 87 1443 All these substances contain oxygen and it has been pointed out that their association formulæ probably involve the quadrivalency of that element.
1937 A. Findlay Hundred Years Chem. ii. 40 The theory of molecular constitution..rested on two main postulates, the quadrivalency of carbon..and the capacity of the carbon atoms for mutual linking.
1981 P. Sykes Guidebk. to Mechanism in Org. Chem. (ed. 5) i. 4 In the enormous majority of its compounds carbon exhibits quadrivalency, e.g. CH4.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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n.1905