| n. | 1. | (Chem.) One of the elements, belonging to the alkaline earth group; a metal having a silver-white color, and melting at a very high temperature. It is difficult to obtain the pure metal, from the facility with which it becomes oxidized in the air. Atomic weight, 137. Symbol, Ba. Its oxide called baryta. |
| Noun | 1. | barium - a soft silvery metallic element of the alkali earth group; found in barite Synonyms: atomic number 56, Ba |
A chalky liquid used to coat the inside of organs so that they will show up on an x-ray.
atomic number 56, Ba, barite, barium sulphate, baryta, barytes, heavy spar, metal, metallic element