photophase

noun
pho·​to·​phase | \ ˈfō-tə-ˌfāz How to pronounce photophase (audio) \

Definition of photophase

2 : the light period of a photoperiodic cycle of light and dark

First Known Use of photophase

1944, in the meaning defined at sense 1

Keep scrolling for more

Learn More about photophase

Statistics for photophase

Time Traveler for photophase

The first known use of photophase was in 1944

See more words from the same year

More from Merriam-Webster on photophase

Rhyming Dictionary: Words that rhyme with photophase

Comments on photophase

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

WORD OF THE DAY

to speed up the process or progress of

Get Word of the Day daily email!

Test Your Vocabulary

Pass the Little Ribbons: A Pasta Word Quiz

  • pasta resembling wheels with spokes
  • Match the pasta to its meaning in English: Rotelle
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

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!