degree-day

noun

de·​gree-day di-ˈgrē-ˌdā How to pronounce degree-day (audio)
: a unit that represents one degree of difference from a given point (such as 65°) in the mean daily outdoor temperature and that is used especially to measure heat requirements

Word History

First Known Use

1832, in the meaning defined above

Time Traveler
The first known use of degree-day was in 1832

Dictionary Entries Near degree-day

degree cut

degree-day

degreeless

See More Nearby Entries 

Cite this Entry

“Degree-day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/degree-day. Accessed 31 Mar. 2023.

Copy Citation

Share

Love words? Need even more definitions?

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

Word of the Day

Listen to the pronunciation of recuse

See Definitions and Examples »

Test Your Vocabulary

Which Came First?

  • baby chick with a brown egg
  • hot take or cold shoulder?
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY
Words at Play
Ask the Editors
Word Games