Definition: In medical terminology, a "convulsionary" is an involuntary movement of the muscles that causes sudden and severe pain or distress. These movements can occur in any part of the body, but they are most commonly seen during seizures, which are abnormal brain activity triggered by a malfunctioning electrical system within the brain. The term "convulsionaries" has been used to describe both benign and malignant convulsions as well as other types of seizures, such as those that result from tumors or infections.