vertebration

There is so little apparent artifice in Whitman's case that he has been accused of being entirely without art, and of throwing his matter together in a haphazard way,—"without thought, without selection," without "composition, evolution, vertebration of style," says Mr. Gosse.

At first we see the vertebration in the hinder region of the skull very clearly.

This segmentation of the muscles was the momentous historical process with which vertebration, and the development of the vertebrate stem, began.

Thus most of the "animal organs" take part in this vertebration.