1. In a catacomb, hypogeum, mausoleum, or other place of entombment, a recess large enough to receive a human corpse, with or without a coffin or sarcophagus, or a cinerarium or ollarium of impressive dimensions. An arched recess is termed arcosolium.
"loculus." A Dictionary of Architecture and Landscape Architecture. . Encyclopedia.com. (August 19, 2018). http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/loculus
"loculus." A Dictionary of Architecture and Landscape Architecture. . Retrieved August 19, 2018 from Encyclopedia.com: http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/loculus