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Definitions of sinus
  1. noun
    a wide channel containing blood; does not have the coating of an ordinary blood vessel

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  2. noun
    an abnormal passage leading from a suppurating cavity to the body surface

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  3. noun
    any of various air-filled cavities especially in the bones of the skull
Definition that contains sinus
  • ac an electric current that reverses direction sinusoidally
  • cavity (anatomy) a natural hollow or sinus within the body
  • erectile filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood
  • cavernous filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood
  • sinusitis inflammation of one of the paranasal sinuses
  • cavum (anatomy) a natural hollow or sinus within the body
  • paranasal sinus any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with the lining of the nasal cavities
  • great cerebral vein a cerebral vein formed by the two internal cerebral veins and continuing into the sinus rectus
  • venae cerebrum inferior veins that drain the undersurface of the cerebral hemispheres and empty into the cavernous and transverse sinuses
  • tongue worm wormlike arthropod having two pairs of hooks at the sides of the mouth; parasitic in nasal sinuses of mammals
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