PROTACTINIUM


Meaning of PROTACTINIUM in English

/proh'tak tin"ee euhm/ , n. Chem.

a radioactive, metallic element. Symbol: Pa; at. no.: 91.

Also, protoactinium .

[ 1915-20; PROT- + ACTINIUM ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .