ACTINIUM

Pronunciation (US):

(GB):

 Dictionary entry overview: What does actinium mean? 

• ACTINIUM (noun)
  The noun ACTINIUM has 1 sense:

1. a radioactive element of the actinide series; found in uranium ores

  Familiarity information: ACTINIUM used as a noun is very rare.

 Dictionary entry details 

• ACTINIUM (noun)

Sense 1

Meaning:

A radioactive element of the actinide series; found in uranium ores

Classified under:

Nouns denoting substances

Synonyms:

Ac; actinium; atomic number 89

Hypernyms ("actinium" is a kind of...):

chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)

Holonyms ("actinium" is a substance of...):

uranium ore (any ore from which uranium can be extracted)

 Context examples 

Mesothorium I is an isotope of radium; mesothorium II is an isotope of actinium.

(Mesothorium, NCI Thesaurus)

The monoclonal antibody moiety of actinium Ac 225 lintuzumab specifically binds to the cell surface antigen CD33 antigen, delivering a cytotoxic dose of alpha radiation to cells expressing CD33.

(Actinium Ac 225 Lintuzumab, NCI Thesaurus)

A radioimmunoconjugate consisting of the humanized monoclonal antibody lintuzumab conjugated to the alpha-emitting radioisotope actinium Ac 225 with potential antineoplastic activity.

(Actinium Ac 225 Lintuzumab, NCI Thesaurus)