photoreaction

play
noun pho·to·re·ac·tion \ˌfō-tō-rē-ˈak-shən\

Definition of photoreaction

  1. :  a photochemical reaction

1909

First Known Use of photoreaction

1909


Medical Dictionary

photoreaction

play
noun pho·to·re·ac·tion \-rē-ˈak-shən\

Medical Definition of photoreaction

  1. :  a photochemical reaction

Learn More about photoreaction


Seen and Heard

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

WORD OF THE DAY

feeling or affected by lethargy

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • ludwig-richter-spring-has-arrived
  • Which is a synonym of upbraid?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ