orthros
noun
or·thros
ˈȯrˌthrȯs
variants or orthron
-thrȯn
plural orthroses or orthrons
often capitalized
: the morning office in the Eastern Orthodox Church somewhat corresponding to the Latin lauds
Word History
Etymology
orthros from Late Greek, from Greek, dawn, sunrise; orthron from Middle Greek or New Greek, alteration of Late Greek orthros; akin to Greek orthos straight, upright