Definition of "loculus"

A little place or space; a cell; a chamberlet.  examples

In ancient catacombs and tombs of some types, a small separate chamber or recess cut into the rock, for the reception of a body or urn.  examples

(zoology) One of the spaces between the septa in the Anthozoa.

(botany) One of the compartments of a several-celled ovary; loculament.  examples