Embolism

Part of speech: noun (n.)

1. Intercalation; the insertion of days, months, or years, in an account of time, to produce regularity; as, the embolism of a lunar month in the Greek year.

2. Intercalated time. Johnson.

3. The occlusion of a blood vessel by an embolus. Embolism in the brain often produces sudden unconsciousness and paralysis.