Are you trying to hyphenate Cd? Unfortunately it cannot be hyphenated because it only contains one syllable.
adj | four hundred, 400, cardinal |
noun | cadmium, Cd, atomic number 48, metallic element, metal |
noun | candle, candela, standard candle, luminous intensity unit, candlepower unit
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noun | certificate of deposit, CD, debt instrument, certificate of indebtedness
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noun | compact disk, compact disc, CD, optical disk, optical disc, recording |