• IPA: /ˈɛmbələs/

embolus (plural emboli)

  1. (pathology) An obstruction causing an embolism: a blood clot, air bubble or other matter carried by the bloodstream and causing a blockage or occlusion of a blood vessel.
  2. (zoology) The structure on the end of the palp of male arachnids which contains the opening to the ejaculatory duct.
    • 1996, Michael J Roberts, Spiders of Britain and Northern Europe, Collins 1996, p. 22:
      Those spiders with a simple bulb insert most of this; those with a complex palp insert only the embolus, which in some species is very long […]

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