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sinus
[sahy-nuhs]
noun
plural
sinusesa curve; bend.
a curving part or recess.
Anatomy.
any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood.
one of the hollow cavities in the skull connecting with the nasal cavities.
an expanded area in a canal or tube.
Pathology.a narrow passage leading to an abscess or the like.
Botany.a small, rounded depression between two projecting lobes, as of a leaf.
sinus
/ ˈɪə /
noun
anatomy
any bodily cavity or hollow space
a large channel for venous blood, esp between the brain and the skull
any of the air cavities in the cranial bones
pathol a passage leading to a cavity containing pus
botany a small rounded notch between two lobes of a leaf, petal, etc
an irregularly shaped cavity
sinus
A cavity or hollow space in a bone of the skull, especially one that connects with the nose.
A channel for the passage of a body fluid, such as blood.
Other Word Forms
- sinuslike adjective
Word History and Origins
Origin of sinus1
Word History and Origins
Origin of sinus1
Example Sentences
Though the most pressing health concern is protecting our lungs from smoke and ash, wildfires can also affect and irritate our sinuses, skin and eyes.
Many of these types of tumour would have previously been considered inoperable because of where they are situated in an area called the cavernous sinus.
"I had a lot of problems with my sinuses when I was younger, so I breathe a lot through my mouth," said Draper.
Wildfires can irritate our sinuses, skin and eyes.
Still, Buchanan Banks said, “by the time we passed Redlands, I noticed that my sinuses and throat were clearing up.”
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