dor·si·ven·tral 
(dôr′sĭ-vĕntrəl) or dor·so·ven·tral (-sō-)
(dôr′sĭ-vĕntrəl) or dor·so·ven·tral (-sō-)adj.
1. Botany Flattened and having distinct upper and lower surfaces, as most leaves do.
2. Biology Extending from a dorsal to a ventral surface: dorsiventral muscles.
dor′si·ventral·ly adv.