ATOMIC NUMBER 40

 I. (noun) 

Sense 1

Meaning:

A lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon

Synonyms:

atomic number 40; zirconium; Zr

Classified under:

Nouns denoting substances

Hypernyms ("atomic number 40" is a kind of...):

metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)

Holonyms ("atomic number 40" is a substance of...):

baddeleyite (a mineral consisting of zirconium oxide)

zircon; zirconium silicate (a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent)

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