| trunk of corpus callosum | The main arched portion of the corpus callosum. Synonym: truncus corporis callosi. (05 Mar 2000) |
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| jugular lymphatic trunk | Lymphatic vessel on each side, conveying the lymph from the head and neck; that on the right side empties into the right lymphatic duct, that on the left into the thoracic duct. Synonym: truncus jugularis, jugular duct. (05 Mar 2000) |
| linguofacial trunk | The common trunk by which the lingual and facial arteries frequently arise from the external carotid artery. Synonym: truncus linguofacialis. (05 Mar 2000) |
| lumbosacral trunk | A large nerve, formed by the union of the fifth lumbar and first sacral nerves, with a branch from the fourth lumbar nerve, which enters into the formation of the sacral plexus. Synonym: truncus lumbosacralis. (05 Mar 2000) |