Plural of barium; multiple samples or forms of barium, the chemical element with atomic number 56.
English plural of 'barium', which comes from 'baryta' (barium oxide) plus '-ium' suffix for chemical elements, itself from Greek 'barys' meaning 'heavy'.
When doctors give you barium before an X-ray of your stomach, they're using an element so heavy it stops X-rays completely—your intestines become visible as a bright white path on the image.
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