Definition

Noun: 1. The chemical element platinum: A dense, valuable, silver-white metal that is very resistant to corrosion and oxidation. It is often found in nature mixed with other metals like nickel and copper.

Usage Notes

• "Pt" is the standard chemical symbol for the element platinum on the periodic table. It is always capitalized.
• In general writing, the full name "platinum" is more common. "Pt" is primarily used in scientific, technical, or industrial contexts (e.g., chemistry, jewelry hallmarks, automotive catalysts).

Examples

• Scientific Context:
  • The catalyst in the laboratory experiment contained Pt.
  • The periodic table shows that Pt has an atomic number of 78.
• Industrial/Commercial Context:
  • The ring was stamped with "Pt" to indicate it was made of platinum.
  • The new Pt-based catalytic converter is more efficient.

Advanced Usage

• In Medicine: "Pt" is a common abbreviation for "patient" in medical charts and notes. This is a completely different meaning from the chemical element.
  • Example: The Pt (patient) was discharged this morning.

Variants and Related Words

• Platinum (n): The full name of the element.
• Platinic (adj): Relating to platinum, especially in its higher valence state.
• Platinoid (adj/n): Resembling platinum; or, one of a group of metals with similar properties.

Synonyms

• Platinum (the full name is the direct synonym for the element).

Important Note on Different Meanings

The abbreviation "pt" (often lowercase) has several other common meanings unrelated to the element platinum. The context is crucial for understanding: * Part: Add 3 pt. flour. * Point: The font size is 12 pt. * Payment: Terms: net 30 pt. * Pint: A pt. of milk. * Patient (medical): See note in "Advanced Usage".

Noun

1. a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits