Terbium

Definition:

• (n.) A rare metallic element, of uncertain identification, supposed to exist in certain minerals, as gadolinite and samarskite, with other rare ytterbium earth. Symbol Tr or Tb. Atomic weight 150.

Compare terbium with other words:

terbium vs. ytterbium

terbic vs. terbium

erbium vs. terbium

terbium vs. yttrium