noun, plural rhexes [rek-seez] . Pathology.
rupture, as of a blood vessel, organ, or cell.

1375–1425; < Neo-Latin < Greek rhêxis a breaking, cleft, derivative of rhēgnýnai to break, break loose; replacing late Middle English rixis (attested once) ≪ Greek, as above

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World English Dictionary
rhexis (ˈrɛksɪs)
med the rupture of an organ or blood vessel
[C17: from Greek rhēxis a bursting]

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Medical Dictionary

rhexis rhex·is (rěk'sĭs)
n. pl. rhex·es (rěk'sēz)
Bursting or rupture of an organ or vessel.

The American Heritage® Stedman's Medical Dictionary
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