coral of the extinct genus Halysites, from the Ordovician and Silurian periods, consisting of oval, laterally compressed corallites united to form a chainlike structure.
[ 1800-10 ]
coral of the extinct genus Halysites, from the Ordovician and Silurian periods, consisting of oval, laterally compressed corallites united to form a chainlike structure.
[ 1800-10 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012