Definition of trigeminus in English:


nounPlural trigemini

  • Each of the trigeminal nerves.

    • ‘Trigeminus neuropathy is commonly seen in men due to a variety of reasons.’
    • ‘To address this question we investigated the development of the N. trigeminus in the Japanese quail.’
    • ‘The nerves we are going to examine are the overorbital and infraorbital ramifications of the trigeminus.’
    • ‘The anatomic path of travel from the nasal mucous membrane to the genitals is through the fifth cranial nerve, or trigeminus which is supremely the ganglionic cranial nerve.’


Late 19th century: from Latin, literally ‘three born at the same birth’, extended to mean ‘threefold’.