platinum sponge


Definition of platinum sponge

: metallic platinum in a gray porous spongy form that is obtained by reducing ammonium chloroplatinate, that occludes large volumes of oxygen, hydrogen, and other gases, and that is used as a catalyst

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More about platinum sponge

Statistics for platinum sponge

Cite this Entry

“Platinum sponge.” Dictionary, Merriam-Webster, Accessed 24 Nov. 2020.

Comments on platinum sponge

What made you want to look up platinum sponge? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!