ventral

英['ventr(ə)l] 美['vɛntrəl]

1. toward or on or near the belly (front of a primate or lower surface of a lower animal);

"the ventral aspect of the human body"

"the liver is somewhat ventral in position"

"ventral (or pelvic) fins correspond to the hind limbs of a quadruped"

2. nearest to or facing toward the axis of an organ or organism;

"the upper side of a leaf is known as the adaxial surface"