lochia UK /ˈlɒ.kɪ.ə/US /ˈloʊ.ki.ə/ noun[plural only]1 •Normal post-partum vaginal discharge; blood, mucus, and placental tissue that are discharged from a female's vagina (similar to menstruation) for several weeks after she has given birth.In April 1819, I attended a young married lady in her first pregnancy, in whose case the lochia began to diminish on the seventh day after parturition, [...] — 1822