Involuntary blinking or spasmodic contraction of the eyelids.
From Greek 'blepharon' (eyelid) + the suffix '-ism' (condition or disease). The suffix '-ism' typically indicates an abnormal state or pathological condition.
Blinking is usually automatic and we never think about it, but when it becomes compulsive or uncontrollable, giving it a Greek name makes the medical profession take it seriously as a real disorder.
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