sinus

IPA: sˈaɪnʌs

noun

  • (anatomy, zootomy) A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).
  • (anatomy) An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
  • (physiology, attributive) Relating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat.
  • (pathology) An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
  • (botany) A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
  • (geography) A bay of the sea; a recess in the shore.
  • (trigonometry) Synonym of sine.
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Examples of "sinus" in Sentences

  • He went to the dentist to check his sinus.
  • The sinus is caused in the embryonic stage of development.
  • The area of mare to the southwest is named the Sinus Lunicus.
  • They freeze the damaged muscle which is near the coronary sinus.
  • In some cases, it is absent and the root is in fact in the sinus.
  • The flow within the draining vein or venous sinus is anterograde.
  • The preferred treatment is endoscopic surgery to deflate the sinus.
  • In the males, the sinus tubercle gives rise to the seminal colliculus.
  • Expansion of the cyst causes erosion of the floor of the maxillary sinus.
  • The cause of sinus infection is bacteria in the lining cells of the sinuses.

Related Links

synonyms for sinusdescribing words for sinus
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