Medical Definition of Jugular bulb
One of two dilated parts of the internal jugular vein: the superior bulb (Heister's diverticulum) is a dilation at the beginning of the internal jugular vein in the jugular fossa of the temporal bone; the inferior bulb is a dilat ed portion of the vein just before it reaches the brachiocephalic vein.
Synonym: jugular bulb, bulbus venae jugularis.
(05 Mar 2000)
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