Definition

1. Noun:
   • A metallic element of the rare earth group: Terbium is a chemical element (symbol Tb) belonging to the lanthanide series on the periodic table. It is a soft, silvery-white, malleable metal.
   • Used in lasers; occurs in apatite and monazite and xenotime and ytterbite: Terbium has specialized applications in technology, such as in solid-state devices and as a dopant in materials that produce green light in lasers and phosphors. It is not found freely in nature but is contained within various minerals.

Usage Examples

• Noun:
  • Terbium is a key component in some green phosphors used in television tubes and fluorescent lamps.
  • Scientists isolated terbium from the mineral ytterbite.

Advanced Usage

• "Terbium-doped": Used to describe a material that has been infused with terbium ions to alter its properties, particularly its luminescence.
  • The terbium-doped crystal is essential for the laser's operation.

Variants and Related Words

• Terbic (adj): A rarely used adjective relating to terbium or its compounds, especially those where terbium has a valence of three.
  • The terbic oxide was prepared for the experiment.

Synonyms

• Element 65: Referring to its atomic number.
• Tb: Its chemical symbol.

Notes on Meaning

• The primary meaning of "terbium" is strictly as a chemical element. It does not have idiomatic or figurative meanings. Its usage is almost exclusively scientific and technical, within fields like chemistry, physics, and materials engineering.

Noun

1. a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite