c. 1400, emorosogie (modern form by 17c.), from Latin haemorrhagia, from Greek haimorrhagia, from haimorrhages "bleeding violently," from haima "blood" (see -emia) + rhagē "a breaking, gap, cleft," from rhēgnynai "to break, burst," from PIE *uhreg- "break." Related: Hemorrhagic.