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.

• 🇨🇳指身体内的腔隙或通道，例如颅骨内充满空气的空腔、从感染腔隙通向皮肤的异常通道，或缺乏典型血管内衬的宽大血管通道。

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.

   🇨🇳窦道

   同义词: 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.

   🇨🇳鼻窦

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.

   🇨🇳血窦

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