Gk. /ef'khaw law"yee awn/ ; Eng. /yooh'keuh loh"jee on', -euhn/ , n. , pl. euchologia Gk. /-yee ah/ ; Eng. /-jee euh/ . Eastern Ch.
a service book containing liturgies, prayers, and other rites.
Also, euchology .
[ 1645-55; euchológion prayer book, equiv. to euch ( é ) prayer + -o- -O- + -log- word + -ion n. suffix ]