noun
: one of various cartilaginous rods forming the skeletal frame of the visceral or branchial arches in rays and sharks and in the embryos of higher vertebrates
noun
: one of various cartilaginous rods forming the skeletal frame of the visceral or branchial arches in rays and sharks and in the embryos of higher vertebrates
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012