noun, noun which may take the genitive case particle 'no'
surrogate
Used as a noun or with の to modify another noun, referring to a substitute or stand-in, often in technical or formal contexts. Compare with 代理 (だいり), which is more common for general proxy or representation.
See also: 代理
Surrogate keys are often used in databases.
In this study, mice were used as a surrogate model for humans.