Body Space or Junction
sinus Audio
si·nus [ sahy-nuhs ]
Etymology:
Latin sinus = a bay or anything hollowed out
Definitions related to sinus - general anatomical term:
  • (sinus) A cavity, space, or channel in the body. Examples include hollow spaces in the bones at the front of the skull, and channels for blood and lymph. Sinuses may also be found in the heart, brain, and other organs.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • (sinus) A recess, cavity, or channel.
    NCI
    U.S. National Cancer Institute, 2021
  • Sinus, in anatomy, a hollow, cavity, recess, or pocket; a large channel containing blood; a suppurating tract; or a cavity within a bone. Two types of sinus, the blood-filled and the air-filled sinuses, are discussed in this article. The cranial venous sinuses are spaces between the layers of dura...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2025
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