vŏpiscus, i, m.,
one of a pair of twins , born alive after the premature birth and death of the other : vopiscos appellabant a geminis, qui retenti utero nascerentur, altero interempto abortu, Plin. 7, 10, 8, § 47; Non. p. 557, 3; Sol. 1 med. ; Isid. Orig. 9, 5.