Why was "tantrum" trending last week?
The symbol for the element praseodymium.
The symbol for praseodymium.
A soft, malleable, silvery metallic element of the lanthanide series that develops a green tarnish in air. It is used to add a yellow tint to glass and ceramics and to make the glass used in welding goggles. Atomic number 59; atomic weight 140.908; melting point 935°C; boiling point 3,127°C; specific gravity 6.8; valence 3, 4. See Periodic Table.
: the PR departmentnoun
Public relations (1940s+)
The country code for Puerto Rico.