trigeminous
born three together; being one of three born at the same birth
threefold
The trigeminous variety presents by far the most interesting pathological entity yet observed among diseases of which cough is a symptom.
trigeminal
With report of two cases and demonstration of anatomical specimens, I described before the last congress of the Deutsche Gesellschaft für Chirurgie an operative procedure modifying Krönlein's method to expose the second and third branch of the trigeminous at the base of the skull.
exhibiting trigeminy
As the action developed further, trigeminous beats began; still later they developed into an irregular spontaneous ventricular rhythm.
Where it comes from
From Latin trigeminus (“born three together”), from tri- + geminus (“twin”). Compare tergeminous.
Adapted from the Wiktionary entry trigeminous (CC BY-SA 4.0).