excurvature

[ eks-kur-vuh-cher ]
/ ɛksˈkɜr və tʃər /

noun

the condition of being curved outward or away from the center.
Also ex·cur·va·tion [ek-sker-vey-shuh n] /ˌɛk skərˈveɪ ʃən/.

Origin of excurvature