sinus

A noun referring to a cavity or channel in the body, such as an air-filled space in the skull bones, an abnormal passage from an infected cavity to the skin, or a wide blood channel without the typical vessel lining.

• 🇫🇷Nom désignant une cavité ou un canal dans le corps, notamment une cavité remplie d'air dans les os du crâne, un passage anormal reliant une cavité infectée à la peau, ou un vaisseau sanguin large dépourvu de la paroi vasculaire typique.

1. Abnormal passage in the body C1 formal medical

   An abnormal channel or cavity that connects an infected area to the surface of the body, often draining pus.

   • The surgeon had to drain the sinus that had formed near the wound.
   • A dental sinus can develop from an untreated tooth abscess.
   • The patient was diagnosed with a chronic sinus leading to the skin surface.

   🇫🇷Fistule

   Synonymes: fistula

2. Air-filled cavities in the skull B2 formal medical

   One of several hollow spaces in the bones of the skull, lined with mucous membrane and connected to the nasal cavity.

   • She has a sinus infection that causes pressure around her eyes.
   • The doctor examined his sinuses with a special scope.
   • Allergies often lead to inflammation of the sinus cavities.

   🇫🇷Sinus de la face

3. Wide blood channel C2 formal medical

   A large, thin-walled channel that carries blood, lacking the typical layers of an ordinary blood vessel.

   • The dural venous sinuses drain blood from the brain.
   • A sinus in the heart wall helps regulate blood flow.
   • The coronary sinus collects blood from the heart muscle.

   🇫🇷Sinus veineux

• sinuses plural form
• sinuses' possessive plural form
• sinus's possessive singular form