We found 11 dictionaries that define the word sinus headache:

General (7 matching dictionaries)

1. sinus headache: Vocabulary.com
2. sinus headache: Dictionary.com
3. Sinus headache: Wikipedia, the Free Encyclopedia
4. sinus headache: Rhymezone
5. sinus headache: FreeDictionary.org
6. sinus headache: Mnemonic Dictionary
7. sinus headache: TheFreeDictionary.com

Computing (1 matching dictionary)

8. sinus headache: Encyclopedia

Medicine (3 matching dictionaries)

9. Headache, sinus, Sinus headache: MedTerms.com Medical Dictionary
10. sinus headache: Medical dictionary
11. Headache, sinus, Sinus headache: Drug Medical Dictionary

Definitions from WordNet (sinus headache) ▸ noun:  a headache resulting from congestion or infection in the paranasal sinuses Opposite: tension headache, migraine headache, cluster headache ▸ Words similar to sinus headache ▸ Usage examples for sinus headache ▸ Idioms related to sinus headache ▸ Wikipedia articles (New!) ▸ Words that often appear near sinus headache ▸ Rhymes of sinus headache ▸ Invented words related to sinus headache