We found 11 dictionaries that define the word photoperiodic:

General (7 matching dictionaries)

1. photoperiodic: Merriam-Webster
2. photoperiodic: Oxford Learner's Dictionaries
3. photoperiodic: Collins English Dictionary
4. photoperiodic: Wiktionary
5. photoperiodic: Dictionary.com
6. Photoperiodic: Wikipedia, the Free Encyclopedia
7. photoperiodic: TheFreeDictionary.com

Computing (1 matching dictionary)

8. photoperiodic: Encyclopedia

Medicine (2 matching dictionaries)

9. photoperiodic: Merriam-Webster Medical Dictionary
10. photoperiodic: Medical dictionary

Science (1 matching dictionary)

11. Botanical Terms (No longer online)

(Note: See photoperiod as well.)

Definitions from Wiktionary (photoperiodic) ▸ adjective:  Of, pertaining to, or exhibiting photoperiodism Similar: thermoperiodic, photochromatic, photophoretic, phenological, phototypic, photogenetic, photochromic, photobiological, photophobic, photophasic, more... Types: long day, short day, day-neutral, more... ▸ Words similar to photoperiodic ▸ Usage examples for photoperiodic ▸ Idioms related to photoperiodic ▸ Wikipedia articles (New!) ▸ Popular nouns described by photoperiodic ▸ Words that often appear near photoperiodic ▸ Rhymes of photoperiodic ▸ Invented words related to photoperiodic