a. [ L. trigeminus born three together; tri- (see Tri-) + geminus twin. Cf. Tergeminous. ] Born three together; being one of three born at the same birth; also, threefold. E. Phillip&unr_;. [ 1913 Webster ]
a. [ See Trigeminous. ] (Anat.) Of, pertaining to, or designating, the fifth pair of cranial nerves, which divide on each side of the head into three main branches distributed to the orbits, jaws, and parts of the mouth; trifacial. [ 1913 Webster ]