define sinus - Search
  1. Dictionary

    si·nus
    [ˈsīnəs]
    noun
    sinus (noun) · sinuses (plural noun)
    1. anatomy
      zoology
      (sinuses)
      a cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities.
      • an irregular venous or lymphatic cavity, reservoir, or dilated vessel.
      • medicine
        an infected tract leading from a deep-seated infection and discharging pus to the surface.
      • botany
        a rounded notch between two lobes on the margin of a leaf or petal.
    2. physiology
      relating to or denoting the sinoatrial node of the heart or its function as a pacemaker:
      "sinus rhythm" · "sinus tachycardia"
    Origin
    late Middle English (in the medical sense): from Latin, literally ‘a recess, bend’.
    Translate sinus to
    No translation found.
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  2. People also ask
    What does sinus mean?Get a quick, free translation! SINUS definition: 1. any of the spaces inside the head that are connected to the back of the nose 2. a space or…. Learn more.
    What should you know about sinusitis?
    primaryExpertImage

    Dr. Ramamurthy Bangalore

    M.D., F.C.C.P., F.A.C.P., F.A.A.S.M. (Pulmonologist) · 30 years of exp

    Sinusitis is an inflammatory or swollen condition affecting the tissue that lines the sinuses. Sinuses are hollow spaces within the bones that run between the eyes, behind the cheekbones, and in the forehead. They produce mucus, which helps maintain the moisture level in the inside of your nose. This provides additional protection against dust, allergens, and pollutants.
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    3 more answers
    microsoftstart.msn.com
    What is a sinus in anatomy?A sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it. Most individuals have four paired cavities located in the cranial bone or skull.
    What is the origin of the word sinus?From Latin sinus. Here also the blood system has no communication with the sinus system of the coelom. The median lacuna no longer exists, but is represented by a dorsal and ventral sinus.
     
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    WEBJul 24, 2023 · A sinus is defined as: A channel that is not a blood or lymphatic vessel that allows for the passage of blood or lymph, such as found in the placenta, sinuses, or the cerebral meninges. A cavity …

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    WEBSinusitis is an inflammation of the tissues lining your sinuses, usually caused by viruses, bacteria or allergies. Learn about the types, signs and complications of sinus infections and how to prevent and treat them.

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