anteroventral adjective 1noun 1forms 3 adjective1 •Relating to the underside of the front of the head.The histial ridge of the heteromorphs is comparatively wide, especially in the anteroventral part, and forms a wide, open cavity —the histial dolon. — 1971 noun1 •Any structure situated under the front of the head (especially of an insect). formsanteroventrals · more anteroventral · most anteroventral