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Noun ba has 2 senses
- barium, Ba, atomic number 56 - a soft silvery metallic element of the alkali earth group; found in barite
--1 is a kind of metallic element, metal
--1 is a substance of heavy spar, barite, barytes, barium sulphate
--1 has particulars: baryta
- Bachelor of Arts, BA, Artium Baccalaurens, AB - a bachelor's degree in arts and sciences
--2 is a kind of bachelor's degree, baccalaureate
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