stratified

باللغة العربية: طَبَقِيّ، مُتَطَبِّق، مُقَسَّمٌ إِلَى طَبَقَات

1. Arranged in a sequence of layers or strata.
2. Of a society, having a class structure.
3. Of a formula in New Foundations: such that there exists a kind of function from pieces of the formula's syntax to the natural numbers.