Words That End With: IUM

• a colony of zooids.

• a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

• a transuranic element with atomic number 105

• a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth

• the inner layer of the periosteum

• a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores

• a radioactive transuranic metallic element produced by bombarding plutonium with neutrons

• a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds

• one of the three sections of the hipbone; situated below the ilium