n 1  :  the lower and larger of the two sensory ganglia of the glossopharyngeal nerve - called also petrosal ganglion , petrous ganglion  - compare SUPERIOR GANGLION1    2  :  the lower of the two ganglia of the vagus nerve that forms a swelling just beyond the exit of the nerve from the jugular foramen - called also inferior vagal ganglion , nodose ganglion  - compare SUPERIOR GANGLION2   .
 
 
 
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