What does Cast mean it's a biology term dealing with evolution?

Question

I need a defination and a sentences thanks.

Answer 1

This is the only definition I could find that made sense from an evolutionary stand point. Not positive it is what you are looking for.

Cast: Sediments deposited by groundwater in a mold, taking the shape and external features of the organism that was removed to form the mold, then gradually changing to sedimentary rock