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sinus
1) A cavity or hollow space in bone or other tissue
2) A channel for passage of blood or lymph without the usual vessel lining.
3) A fistula or tract leading to an abscess.
Specific
anal sinuses (Morgagni crypts)
aortic sinus (of Valsalva)
coronary sinus
dural sinus
longitudinal vertebral venous sinus
oblique sinus of pericardium
paranasal sinus
piriform recess/fossa/sinus
renal sinus (sinus of kidney)
sinus venarum cavarum (sinus of the vena cava)
sinus venosus
sinus venosus sclerae (canal of Schlemm)
tarsal sinus/canal/tunnel
transverse sinus of pericardium (Theile canal)
General
anatomic structure
References
Stedman's Medical Dictionary 26th ed, Williams &
Wilkins, Baltimore, 1995