Fundus (Latin for "bottom") is a generic anatomical term referring to the portion of an organ opposite from its opening. Examples include:
- Fundus (stomach)
- Fundus (uterus)
- Fundus (eye)
- Fundus camera for photographing the interior of the eye.
Fundus (seabed) The seabed in a tidal river below low water mark. This can be owned by the foreshore owner (area between high and low water mark) and may require permission and rent if used for laying a mooring or putting down crab or lobster pots.