ven·tral 
(vĕntrəl)
(vĕntrəl)adj.
1. Anatomy
a. Relating to or situated on or close to the abdomen; abdominal.
b. Relating to or situated on or close to the anterior aspect of the human body or the lower surface of the body of a nonhuman animal.
2. Botany Of or on the surface of an organ or part facing toward the axis; adaxial.
n.
A ventral part, such as a fin or scale.
[Late Latin ventrālis, from Latin venter, ventr-, belly.]
ventral·ly adv.