-rrhagiacomb. form

Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly; see e.g. 
pneumorrhagia n.Origin: A borrowing from Latin. Etymon: Latin -rrhagia.
Etymology:  <  classical Latin -rrhagia (in e.g. haemorrhagia  haemorrhagy n.)  <  ancient Greek -ραγία   a bursting, breaking forth (in e.g. αἱμορραγία  haemorrhagy n.)  <  ῥαγ-  , stem of ῥηγνύναι   to break, burst (of uncertain origin) + -ία  -ia suffix1.Attested from the late 18th cent. onwards in borrowings and adaptations of post-classical Latin words ultimately of Greek origin, earliest in menorrhagia n., metrorrhagia n.   Also found in the 19th cent. in adaptations immediately from French (as perhaps proctorrhagia n. at procto- comb. form , nephrorrhagia n. at nephro- comb. form ) and German (compare lymphorrhagia n.). Formations within English are found from the first half of the 19th cent. onwards, earliest in pneumorrhagia n. at pneumo- comb. form 2. Combining with first elements ultimately of Greek origin. Compare French -rragie (formations in which are found from at least end of the 18th cent. onwards), German -rrhagie.
This is a new entry (OED Third Edition, March 2011; most recently modified version published online December 2020).