Main Entry: trigeminal ganglion Function: noun : the large flattened sensory root ganglion of the trigeminal nerve that lies within the skull and behind the orbit calledalso gasserian ganglion,semilunar ganglion
trigeminal ganglionn. The large, flattened, sensory ganglion of the trigeminal nerve, lying close to the cavernous sinus along the medial part of the middle cranial fossa. Also called gasserian ganglion, semilunar ganglion.
