vallecula

noun, plural val·lec·u·lae [vuh–lek-yuh-lee] /vəˈlɛk yəˌli/. Biology.

1. a furrow or depression.

noun plural -lae (-ˌliː)

1. anatomy any of various natural depressions or crevices, such as certain fissures of the brain
2. botany a small groove or furrow in a plant stem or fruit

n. pl. val•lec•u•lae (-lē′)

1. An anatomical crevice or depression on any surface, such as the deep hollow on the inferior surface of the cerebellum, between the hemispheres, in which the medulla oblongata rests.