DICTIONARY ENTRY
6 SYLLABLES
protoactinium
/,proʊtoʊæk'tɪniəm/ · proʊtoʊæktɪniəm
Protoactinium has 6 syllables: pro · to · ac · tin · i · um.
pro
01
to
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ac
03
tin
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i
05
um
06
noun. A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
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