- cranium), as opposed to the spinal nerves which emerge from the vertebral column. There are twelve cranial nerves. The term "trigeminal" comes from the Latin "trigeminus" meaning "threefold," referring to the three divisions (ophthalmic, maxillary and mandibular) of this nerve.
Medical dictionary. 2011.
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trigeminal — [trī jem′ə nəl] adj. [< ModL trigeminus < L, born three together (< tri ,TRI + geminus, twin) + AL] designating or of either of the fifth pair of cranial nerves, each of which divides into three branches supplying the head and face n. a… … English World dictionary
trigeminal neuralgia — n. a disorder of unknown cause, characterized by severely painful paroxysms along one or more branches of a trigeminal nerve … English World dictionary