Fundus

·noun The bottom or base of any hollow organ; as, the fundus of the bladder; the fundus of the eye.

fundus
fundus, i, m. [Sanscr. budh-nas, ground; Gr. πυθμήν, πύνδαξ; O. H. Germ. Bodam; Germ. Boden; v. fodi...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
fundus
fundus ī, m FVD-, the bottom, lowest part : armari fundum exsecuit: maris, Cu.: Nereus ciet aequor...

An Elementary Latin Dictionary