A blood clot, air bubble, piece of fatty deposit, or other object that has been carried in the bloodstream to lodge in a vessel and cause an embolism.

The patient was diagnosed with a pulmonary embolus after experiencing sudden shortness of breath.

A slender, often spiral structure at the tip of a male spider’s pedipalp that is used to transfer sperm to the female during mating.

The distinctive curve of the embolus helps arachnologists identify the species.