| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Headache Disorders | Health | Common conditions characterized by persistent or recurrent headaches. Headache syndrome classification systems may be based on etiology (e.g., vascular headache, post-traumatic headaches, etc.), temporal pattern (e.g., cluster headache, paroxysmal hemicrania, etc.), and precipitating factors (e.g., cough headache). (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
