noun (jejuna)

1. (anatomy) The central of the three divisions of the small intestine which lies between the duodenum and the ileum.

noun (plural: jugulars, rarely used in plural form)

1. vein through the neck (or thorax) that returns blood from the head back towards the heart. Properly this is called the jugular vein
2. By extension any critical vulnerability ("it was vicious; he went for the jugular").

adjective

1. relating to or located near the neck or throat.