Heraldic insignia (5)
(Other definitions for crest that I've seen before include "Top line of a hill, mountain, or wave" , "Badge" , "Tuft" , "Heraldic device representing a family" , "Surmount" .)
(Other definitions for coat of arms that I've seen before include "Armorial bearings" , "Family insignia" , "Sign of a family" , "Official device" , "Heraldic shield" .)