an organ of a plant, called loculus 植物の器官としての房室 - EDR日英対訳辞書
In later years it became popular for monasteries to have a square-shape vihara with a courtyard in the center, surrounded by a loculus, in addition to a shido (a hall dedicated to the souls of ancestors) in which the subject of worship (a stupa or Buddhist statue) was placed.
後期の僧院では、礼拝の対象(塔または仏像)を安置した祠堂(しどう)の他に、中央の中庭を囲んで房室を持つ方形の精舎(しょうじゃ)が流行した。 - Wikipedia日英京都関連文書対訳コーパス