gradatory

A series of steps from a cloister into a church.

Proceeding step by step; gradual.

Could we have seen [Macbeth's] crimes darkening on their progress […] could this gradatory apostasy have been shown us.

Suitable for walking, or able to walk (said of an animal, especially a bird, or of the limbs of an animal when adapted for walking on land).

Under this name we group together a large number of very similar forms; or if dissimilar, forms connected by gradatory specimens