Threadlike defensive organs, composed largely of nettling cells (cnidae), thrown out of the mouth or special pores of certain Actiniae when irritated.
It is largely used in the preparation of aluminium and alumina, and for the lining of furnaces which are exposed to intense heat. n
consists largely of zinc sulfide in crystalline form
It is of a shining black or ebony color, and is largely used for making ornaments.
largely covered by dense jungle and rain forest
