| ciliary veins | Several small veins, anterior and posterior, coming from the ciliary body. Synonym: venae ciliares. (05 Mar 2000) |
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| middle haemorrhoidal veins | An obsolete term for middle rectal veins. (05 Mar 2000) |
| middle hepatic veins | Veins draining the central portion of the liver (the superior anterior segment [VIII] and the left side of the inferior anterior segment [V] of the right lobe and the medial segment [IV] of the left lobe) which join to form a trunk that merges with that of the left hepatic veins about 90% of the time prior to entering the left side of the inferior vena cava. Synonym: venae hepaticae mediae. (05 Mar 2000) |
| middle meningeal veins | The venae comitantes of the middle meningeal artery that empty into the pterygoid plexus. Synonym: venae meningeae mediae. (05 Mar 2000) |
| Ruysch's veins | Portacaval anastomoses formed from vein's in the walls of retroperitoneal viscera, such as the ascending and descending colon, passing to the tributaries of the inferior vena cava in the posterior body wall instead of those of the portal vein. Synonym: Ruysch's veins. (05 Mar 2000) |
| middle rectal veins | Several veins that pass from the rectal venous plexus (in which they anastomose with the superior rectal veins) to the internal iliac vein, which ultimately drains into the inferior vena cava. Since the superior rectal veins ultimately drain into the portal vein, the middle retal veins participate in a portocaval anastomosis, and the rectal venous plexus is subject to varicosities during portal hypertension. Synonym: venae rectales mediae. (05 Mar 2000) |
| circumflex veins | See: deep circumflex iliac vein, superficial circumflex iliac vein, lateral circumflex femoral veins, medial circumflex femoral veins. (05 Mar 2000) |
| phrenic veins | See: inferior phrenic vein, superior phrenic veins. (05 Mar 2000) |
| Cockett communicating perforating veins | Mid-thigh perforation veins that connect the deep and superficial venous systems. (05 Mar 2000) |
| colic veins | See: right colic vein, middle colic vein, left colic vein. (05 Mar 2000) |
| plantar digital veins | Drain the plantar and distal dorsal aspects (nail beds) of the toes and pass back to form four metatarsal veins that in turn empty into the plantar venous arch. Synonym: venae digitales plantares. (05 Mar 2000) |
| plantar metatarsal veins | Veins receiving the plantar digital veins and draining in turn into the deep plantar venous arch, which empties into the medial and lateral plantar veins. Synonym: venae metatarseae plantares. (05 Mar 2000) |
| conjunctival veins | The veins of the conjunctiva which drain primarily to the ophthalmic veins. Synonym: venae conjunctivales. (05 Mar 2000) |
| musculophrenic veins | The veins that accompany the musculophrenic artery and drain blood from the upper abdominal wall, and anterior portions of the lower intercostal spaces and the diaphragm. Synonym: venae musculophrenicae. (05 Mar 2000) |
| pontine veins | Several veins running transversely on the pons to join the petrosal vein. Synonym: venae pontis, veins of pons. (05 Mar 2000) |