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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
  • alternating current an electric current that reverses direction sinusoidally
  • sinus sigmoideus an S-shaped dural sinus on the temporal and occipital bones
  • right atrium the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus
  • internal jugular vein a continuation of the sigmoid sinus of the dura mater; joins the subclavian vein to form the brachiocephalic vein
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