Search Result：atomic number 40
atomic number 40 
(TTS Sound)
(TTS Sound)Overview of noun atomic_number_40
The noun atomic number 40 has 1 sense
- zirconium, Zr, atomic number 40 -- (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)