ethmoid :

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ethmoid


  • n  one of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity

  • These bony caverns are called the frontal, maxillary or antrum, ethmoid and sphenoid sinuses.
  • They are the occipital, the two parietals, the frontal, the two temporals, the sphenoid (wedge-formed) and the ethmoid (sieve-formed).

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