subsellium

Century Dictionary and Cyclopedia

1. n. Same as miserere, 2.
2. n. plural In Roman law, the lower seats where the judices and inferior magistrates sat in judgment.

Wiktionary

1. n. A projecting ledge on the stalls in a church where persons might lean whilst standing during prayers; misericord.

GNU Webster's 1913

1. n. One of the stalls of the lower range where there are two ranges. See Illust. of stall.