sinus meaning

Pronunciation:   "sinus" in a sentence
Noun: sinus  sInus
  1. An abnormal passage leading from a suppurating cavity to the body surface
    - fistula 
  2. Any of various air-filled cavities especially in the bones of the skull 
  3. A wide channel containing blood; does not have the coating of an ordinary blood vessel
    - venous sinus

Derived forms: sinuses

Type of: bodily cavity, canal, cavity, cavum, channel, duct, epithelial duct, passage, passageway

Encyclopedia: Sinus

n : a cavity or hollow in the body: as
a : a narrow elongated tract extending from a focus of suppuration and serving for the discharge of pus ‹a tuberculous sinus›
b (1) : a cavity in the substance of a bone of the skull that usu. communicates with the nostrils and contains air (2) : a channel for venous blood (3) : a dilatation in a bodily canal or vessel


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  1. sinus rhythm can often be maintained with quinidine.
  2. the cold congested his sinuses.
  3. sinus bradycardia occurs when the heart rate falls below 60.
  4. this normal variation in rhythm is known as sinus arrhythmia.
  5. sinus arrhythmia also tends to disappear with advancing age.

Related Words

  1. sinuous meaning
  2. sinuously meaning
  3. sinuousness meaning
  4. sinupallial meaning
  5. sinupalliate meaning
  6. sinus arrhythmia meaning
  7. sinus arrhythmias meaning
  8. sinus bradycardia meaning
  9. sinus cavernosus meaning
  10. sinus coronarius meaning
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