Tantalum

**Definition:** A rare metallic element, atomic number 73, atomic weight 180.948, symbol Ta. It is a noncorrosive and malleable metal that has been used for plates or disks to replace cranial defects, for wire sutures, and for making prosthetic devices.

**Tree numbers:** - D01.268.556.837 - D01.268.956.859 - D01.552.544.837

**Synonyms:** - Tantalum-181