English dictionary atomic number 67 meaning and definition Definition and meaning of atomic number 67 at MeaningMonkey.org. atomic number 67 meaning and definition in the English Dictionary. ATOMIC NUMBER 67 nounDefinition of atomic number 67 (noun)a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compoundssynonyms: Ho, holmium Source: Princeton University Wordnet
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