cor·al 
/ˈkorəl/ noun
/ˈkorəl/ noun [noncount] 1 : a hard material formed on the bottom of the sea by the skeletons of small creatures
▪ brightly colored fishes swimming among the coral 2 : an orange pink color — see color picture
▪ brightly colored fishes swimming among the coral
— coral adjective
▪ coral deposits
▪ coral deposits
