Crater periphery (3)
I believe the answer is:
rim
(Other definitions for rim that I've seen before include "Flange" , "Raised edge of a round object" , "Brim, edge" , "'Brim, lip (3)'" , "Circular outer edge" .)
I believe the answer is:
rim
(Other definitions for rim that I've seen before include "Flange" , "Raised edge of a round object" , "Brim, edge" , "'Brim, lip (3)'" , "Circular outer edge" .)