Dictionary of Human Evolution and Biology

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Cavity in the anterior of the face, superior to the nasal cavity and interior to the forehead, that protects and contains the eyes and its associated musculature and nerves. Adjective: orbital. In anthropoids the orbits are a composite of six different cranial and facial bones: lacrimal, ethmoid, frontal, sphenoid, zygomatic, and maxillary bones; aka eye socket.

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From "Dictionary of Nursing and Individual Health Care"