(a.) Having the form of a funnel, or tunnel; that is, expanding gradually from the bottom upward, as the corolla of some flowers; infundibuliform.

boat-shaped boatlike bowl-shaped bowllike cavelike cavernous concave concaved cone-shaped coned conelike conic craterlike cup-shaped cupped cymbiform dish-shaped dished dishing dishlike funnel-breasted funnel-chested funnelform funnelled funnellike hollow hollowed incurved incurving incurvous infundibular infundibuliform navicular naviform retiring retreating saucer-shaped scaphoid scyphate spheroconic spoonlike sunk sunken