Lewis Short
jūnix | jŭvĕnix (noun F) : or uncontr. , , juvenix
* A young cow, a calf, heifer: tot tibi cum in flammas junicum omenta liquescant,Pers. 2, 47.—In the form juvenix, of a maiden (cf.: δάμαλις, juvenca): quam mox horsum ad stabulum juvenix recipiat se pabulo,Plaut. Mil. 2, 3, 38 Ritschl. dub. (MSS. juvenis).
Charlton T. Lewis, Charles Short, A Latin Dictionary