photocatalyst

noun
pho·​to·​cat·​a·​lyst | \ -ˈkat-ᵊl-əst How to pronounce photocatalyst (audio) \

Medical Definition of photocatalyst

: a substance that catalyzes the main reaction in photocatalysis

Learn More about photocatalyst

Share photocatalyst

Comments on photocatalyst

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

WORD OF THE DAY

grandiloquent, ostentatious, or bombastic

Get Word of the Day daily email!

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt-painting-a-young-scholar-and-his-tutor
  • Which of the following is the earliest known sense of the word awe?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

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

TAKE THE QUIZ

Love words? Need even more definitions?

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