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-rrhagiaThe diagraph rh occurring at the beginning of a syllable in a word of Greek origin is ordinarily changed to rrh when a prefix or other lexical element is placed before it, as in this terminal form, from rhexis.
Excessive or unusual discharge; hemorrhage.
[G. rhēgnymi, to burst forth]
-rhage, -rrhage , -rhagia , -rrhagia
Combining forms meaning excessive flow.
[G. haimorrhagia, hemorrhage, bleeding]