We found 3 dictionaries that define the word day length:

General (1 matching dictionary)

1. Day length: Wikipedia, the Free Encyclopedia

Medicine (1 matching dictionary)

2. day length: Medical dictionary

Tech (1 matching dictionary)

3. National Weather Service Glossary (No longer online)

Phrases: Day length fluctuations, more... ▸ Words similar to day length ▸ Usage examples for day length ▸ Idioms related to day length ▸ Wikipedia articles (New!) ▸ Words that often appear near day length ▸ Rhymes of day length ▸ Invented words related to day length