| common iliac vein | <anatomy, vein> Formed by the union of the external and internal iliac veins at the brim of the pelvis and passes upward behind the internal iliac artery to the right side of the body of the fifth lumbar vertebra where it unites with its fellow of the opposite side to form the inferior vena cava; the left common iliac vein is submitted to a pulsating compression by the right common iliac artery against the vertebral column which may result in partial obstruction of the vein. Synonym: vena iliaca communis. (05 Mar 2000) |
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| common intermediate | <biochemistry, chemistry> A molecule that is shared by two chemical reactions as a product of the first and a reactant in the second. (09 Oct 1997) |
| common interosseous artery | <anatomy, artery> Origin, ulnar; branches, anterior and posterior interosseous. Synonym: arteria interossea communis. (05 Mar 2000) |
| common ion effect | <chemistry> The influence on an equilibrium by the presence of a substance which contains ions that participate in the equilibrium. (09 Oct 1997) |
| common limb of membranous saemicircular ducts | The united, nonampullary ends of the superior and posterior saemicircular ducts. Synonym: crus membranaceum commune ductus saemicircularis, common limb of membranous saemicircular ducts. (05 Mar 2000) |
| common migraine | A form of migraine headache without the visual prodrome, that is not limited on one side of the head but nevertheless is recognizable as migraine because of the stereotyped course; the tendency to nausea, photophobia, and phonophobia; and the relief produced by sleep. (05 Mar 2000) |
| common opsonin | That normally present in the blood, i.e., without stimulation by a known, specific antigen such as certain complement components; it is relatively thermolabile and reacts with various organisms. Synonym: common opsonin, thermolabile opsonin. Specific opsonin, antibodies formed in response to stimulation by a specific antigen, either as a result of an attack of a disease, or injections with a suitably prepared suspension of the specific microorganism. Synonym: immune opsonin, thermostable opsonin. (05 Mar 2000) |
| common palmar digital artery | <anatomy, artery> One of three arteries arising from the superficial palmar arch and running to the interdigital clefts where each divides into two proper palmar digital arteries. Synonym: arteria digitalis palmaris communis. (05 Mar 2000) |
| common palmar digital nerves | Four nerves in the palm that send branches (proper palmar digital nerves) to adjacent sides of two digits; three are branches of the median, one is from the ulnar. Synonym: nervi digitales palmares communes. (05 Mar 2000) |
| common peroneal nerve | <anatomy, nerve> One of the terminal divisions of the sciatic nerve, diverging from the tibial nerve at the upper end of the popliteal fossa, then coursing with the biceps tendon along the lateral portion of the popliteal space to wind around the neck of the fibula where it divides into the superficial and deep peroneal nerves. The common peroneal nerve, or its deep branch, is the most commonly injured nerve, being located in a lateral subcutaneous position at the fibular neck; a lesion causes a loss of ability to dorsiflex the foot ("foot drop"). Synonym: nervus fibularis communis, nervus peroneus communis, common fibular nerve, lateral popliteal nerve. (05 Mar 2000) |
| common plantar digital artery | <anatomy, artery> One of four arteries arising from a superficial plantar arch, when present as a variation. They unite with the plantar metatarsal arteries. Synonym: arteria digitalis plantaris communis. (05 Mar 2000) |
| common plantar digital nerves | Three nerves derived from the medial plantar and one from the lateral plantar that supply the skin overlying the metatarsals and terminate as proper plantar digital nerves to the side of each toe. Synonym: nervi digitales plantares communes. (05 Mar 2000) |
| common salt | <chemical> Table salt, NaCL. (09 Oct 1997) |
| common-source epidemic | <microbiology> An epidemic resulting from infection of a large number of people from a single contaminated source. (09 Oct 1997) |
| common tendinous ring | A fibrous ring that surrounds the optic canal and the medial part of the superior orbital fissure; it gives origin to the four rectus muscles of the eye and is partially fused with the sheath of the optic nerve. Synonym: annulus tendineus communis, Zinn's ligament, Zinn's ring, Zinn's tendon. (05 Mar 2000) |