One of the mysteries of the English language finally explained.
1often sinusesAnatomy Zoology
A cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities.
space, chamber, hollow, hole, pocket, pouchView synonyms
- ‘Your sinuses are hollow spaces within the bones of your face, behind and above your nose.’
- ‘Common wood dust produced in sanding furniture and cabinets is associated with increases in cancer of the nasal cavities and sinuses.’
- ‘The two cavernous sinuses are large veins lying within the skull cavity, immediately behind each eye socket and on either side of the pituitary gland.’
- ‘During a physical examination, your doctor may feel for tenderness in the area of the sinuses and examine your nasal passages looking for inflammation, secretions or deformities.’
- ‘The sheep's nasal cavity and sinuses are orientated in a similar fashion to man's.’
- 1.1 An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
- 1.2Medicine An infected tract leading from a deep-seated infection and discharging pus to the surface.
- ‘Asthma, allergies, or a chronic infection in the sinuses or breathing passages might also be responsible for long-term coughs.’
- ‘The paranasal sinuses are a common infection site in children and adolescents.’
- ‘Pneumonia, bronchitis, and sinus and ear infections are three examples of complications from flu.’
- ‘When the linings of your sinuses become infected, usually due to viruses or bacteria, they may swell, causing an obstruction and interfering with the normal drainage of mucus.’
- ‘Sinusitis is when the sinuses get infected or irritated and cannot drain mucus as well as they should.’
- 1.3Botany A rounded notch between two lobes on the margin of a leaf or petal.
as modifier Relating to or denoting the sino-atrial node of the heart or its function of regulating the heartbeat.‘sinus rhythm’‘sinus tachycardia’
- ‘Although this medicine has been used to treat heart failure for more than 200 years, its role in patients with congestive heart failure and sinus rhythm is still debatable.’
- ‘The sinus node can increase your heart rate during times of high demand, such as during exercise.’
- ‘Sinus dysrhythmia refers to a malfunction of the sinus node, the heart's natural pacemaker.’
- ‘Electrodes positioned at various sites in the heart can give only limited data about intracardiac conduction during sinus rhythm at rest.’
- ‘A normal heart rhythm is one in which each heartbeat originates in the sinus node and proceeds normally through the rest of the body's electric conduction system.’
Late Middle English (in the medical sense): from Latin, literally ‘a recess, bend’.
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