(senseid)The element (''symbol'' Ba) with an number of 56. It is a soft, reactive, silvery earth metal.
A single atom of this element.
sulfate suspension.
(l)
barium
barium
(l)
A part of barium
barium (gloss)
(l), chemical element, symbol (ll) (topics)
(l), chemical element, symbol (l) (topics)