Gk. /kah"theez mah/ ; Eng. /ka thiz"meuh/ , n. , pl. kathismata Gk. /kah theez"mah tah/ ; Eng. /ka thiz"meuh teuh/ .
one of the 20 divisions of the Psalter in the Greek rite.
Also, cathisma .
[ káthisma seat, equiv. to kathís ( is ) a sitting (equiv. to kathid-, s. of kathízein to sit down (itself equiv. to kat- KAT- + hízein to set, sit; see SIT) + -sis -SIS, with -ds- > -s- ) + -ma agent suffix ]