Definitions for "Portland stone"
Keywords:  isle, dorset, jurassic, limestone, whit
A yellowish-white calcareous freestone from the Isle of Portland in England, much used in building.
Natural stone from Portland Bill. There are several grades, the best of which is Whit Bed.
This is a high quality dimension stone originating from the Isle of Portland in Dorset. It is a strong uniform stone (Jurassic oolite) without internal laminations.