anteroventral

adjective

an·​tero·​ven·​tral ˌan-tə-(ˌ)rō-ˈven-trəl 

: located in front and toward the lower surface

The key morphological innovations producing these holes are found on the vomer, the anteroventral element of the neurocranium.

—Stephen F. Norton, Science

anteroventrally adverb