platinum : Idioms & Phrases

• noun a fine black powder of platinum; used as a catalyst in chemical reactions
  

WordNet

• (Chem.), a soft, dull black powder, consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer.

Webster 1913

• noun a blond whose hair is a pale silvery (often artificially colored) blond
  platinum blond.
  

WordNet

• noun a blond whose hair is a pale silvery (often artificially colored) blond
  platinum blond.
  

WordNet

• (Elec.), a kind of incandescent lamp of which the luminous medium is platinum. See under Incandescent.

Webster 1913

• (Chem.), the group of metallic elements which in their chemical and physical properties resemble platinum. These consist of the light platinum group, viz., rhodium, ruthenium, and palladium, whose specific gravities are about 12; and the heavy platinum group, viz., osmium, iridium, and platinum, whose specific gravities are over 21.

Webster 1913

• (Chem.), metallic platinum in a gray, porous, spongy form, obtained by reducing the double chloride of platinum and ammonium. It absorbs oxygen, hydrogen, and certain other gases, to a high degree, and is employed as an agent in oxidizing.

Webster 1913

• noun thermometer that measures temperature by changes in the resistance of a spiral of platinum wire
  resistance thermometer.
  

WordNet

• adjective satellite of hair color; whitish
  towheaded; ash-blonde.
  

WordNet

• . See under Platinum.

Webster 1913