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: Pâ Pæ Pè Pé Pœ P- P. P/ P< Pa Pb Pc Pd Pe Pf Ph Pi Pj Pk Pl Pm Pn Po Pp Pr Ps Pt Pu Pv Pw Px Py

proto- | proto-doric | proto-indo european | proto-norse | proto-oncogene | protoactinium | protoanthropology | protoarchaeology | protoarcheology | protoavis | protocanonical

Table of Contents POS
HYPHEN
WORDNET DICTIONARY

protoactinium

:

Noun

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pro=to=ac=tin=i=um

WORDNET DICTIONARY

Noun protoactinium has 1 sense

protoactinium(n = noun.substance) atomic number 91, pa, protactinium - a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead; Array

is a kind of metal, metallic element

For further exploring for "protoactinium" in Webster Dictionary Online

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