Editing Sinus

{{Wiktionary|sinus|Sinus}}
'''Sinus''' may refer to:
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==History==
* a sac in front of body worn into a [[toga]], in the typical style of wearing it

==Anatomy==
* [[Sinus (anatomy)]], a sac or cavity in any organ or tissue
** [[Paranasal sinuses]], air cavities in the cranial bones, especially those near the nose, including:
*** [[Maxillary sinus]], is the largest of the paranasal sinuses, under the eyes, in the maxillary bones
*** [[Frontal sinus]], superior to the eyes, in the frontal bone, which forms the hard part of the forehead
*** [[Ethmoid sinus]], formed from several discrete air cells within the ethmoid bone between the eyes and under the nose
*** [[Sphenoidal sinus]], in the sphenoid bone at the center of the skull base under the pituitary gland
** [[Anal sinuses]], the furrows which separate the columns in the rectum
** [[Dural venous sinuses]], venous channels found between layers of dura mater in the brain
* [[Sinus (botany)]], a space or indentation, usually on a leaf

===Heart===
* [[Sinus node]], a structure in the superior part of the right atrium
* [[Sinus rhythm]], normal beating on an ECG
* [[Coronary sinus]], a vein collecting blood from the heart
* [[Sinus venosus]], a cavity in the heart of embryos              
* [[Sinus venarum]], a part of the wall of the right atrium in adults, developed from the sinus venosus

==Other uses==
* [[Sinus (Chalcidice)]], a town of ancient Chalcidice, Greece
* ''Sinus'', gulf or bay in Latin, used in numerous toponyms in ancient writing (e.g., [[Sinus Magnus]], [[Sinus Flanaticus]], etc.)
* [[Sine]], a trigonometric math function (Latin ''sinus'')

==See also==
* [[Sinus Medii]], a small lunar mare
* [[Sinus Successus]], a lunar feature
* [[Sines]], a municipality in Alentejo, Portugal (Latin ''Sinus'')
* [[Sinusitis]], a common ailment resulting in the inflammation of the paranasal sinuses

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