Definition from Wiktionary, the free dictionary
ventral (not comparable)
- Related to the abdomen or stomach
- (anatomy) On the front side of the human body, or the corresponding surface of an animal, usually the lower surface.
- An anatomical term referring to the bottom portion of either foot and/or hand.
- (human anatomy direction adjectives) anterior, distal, dorsal, lateral, medial, posterior, proximal, ventral (Category: en:Medicine) 
on the front side of the human body or the according surface of an animal
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ventral (plural ventrals)
- Any of the enlarged and transversely elongated scales that extend down the underside of a snake's body from the neck to the anal scale.