palladium

/pə'leidjəm/

Thân thiện

A jeweler carefully sets a polished palladium ring into a velvet display case.

Definition

1. Noun:
   • A chemical element: A rare, silver-white metallic element belonging to the platinum group of metals. It is malleable, ductile, and does not tarnish in air at ordinary temperatures.
   • A protective symbol (archaic): In classical mythology and by extension, a source of protection or safeguard. This meaning is now rare and primarily found in historical or literary contexts.

Examples of Usage

• Noun (Chemical Element):
• Noun (Protective Symbol - Archaic): (This usage is historical.)

Advanced Usage

• "a palladium of liberty": A phrase used in political or philosophical writing to describe something viewed as a fundamental guarantee or safeguard of freedom.

Variants and Related Words

• Palladian (adj): Relating to or containing palladium.
• Palladious (adj): Of or relating to palladium, especially with a valence of two. (Technical, chemistry)

Synonyms

• Element 46 (Technical): Referring to its atomic number.
• Pd (Symbol): The chemical symbol for palladium.
• Guardian (For the archaic sense): A defender or protector.

Related Phrases

• Palladium black: A fine powder form of palladium used as a catalyst.

Học thuật

Noun

1. a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry

Từ đồng nghĩa

• Pd
• atomic number 46