See Also: lateral corticospinal tract(medicine)
lateral pyramidal tract(medicine)
lateral spinothalamic tract(medicine)
lateral root of optic tract(medicine)
lateral sinus(medicine)
Amberg's lateral sinus line(medicine)
lateral mammary branches of lateral thoracic artery(medicine)
lateral vein of lateral ventricle(medicine)
lateral mammary branches of lateral cutaneous branches of thoracic spinal nerves(medicine)
lateral mammary branches of lateral cutaneous branches of intercostal nerves(medicine)

tract(3) (iou) and lateral sinus (medicine)


tract(3) (iou)



tract noun2. [trakt] LME.
[from medieval Latin TRACTUS. Cf. TRACT noun3.]
Roman Catholic Church (now Hist.). An anthem of verses of Scripture formerly sung or recited instead of the alleluia in the Mass on certain penitential days and at requiems.

lateral sinus (medicine)


lateral sinus -->
transverse sinus


A paired dural venous sinus that drains the confluence of sinuses, running along the occipital attachment of the tentorium cerebelli and terminating in the sigmoid sinus.

Synonym: sinus transversus, lateral sinus.

Transverse pericardial sinus, a passage in the pericardial sac between the origins of the great vessels, i.e., posterior to the intrapericardial portions of the pulmonary trunk and ascending aorta and anterior to the superior vena cava and superior to the atria; it is formed as a result of the flexure of the heart tube, partially approximating the great venous and arterial vessels.

Synonym: sinus transversus pericardii, Theile's canal, transverse sinus of pericardium.