trigeminous [ˏtrai'dʒeminәs]
具三对的
Trigeminous \Tri*gem"i*nous\, 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?.