In essence, this is a specialized form of protection racket.

Later, the role evolved into a separate and more specialized form.

There are even specialized forms for various students who had different physical shapes and abilities.

I found a certain specialized form of meditation to be most useful.

Again, perhaps a specialized form has more room to grow, even within its limited environment, here on the Ringworld.

A spit may be considered a specialized form of a shoal.

There is also a specialized form of fine art in which the artists perform their work live to an audience.

City maps are generally a specialized form of street map.

Highly specialized forms of transaction organizations emerge at this stage.

It is a specialized form of a wave tank.