| catamenial | Relating to the menses. Synonym: catamenial, emmenic. Origin: L. Menstrualis (05 Mar 2000) |
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| catamenial pneumothorax | <radiology> FEMALE of childbearing age, (** most spont. Ptx's occur in males), onset of menses with or without 3 days, associated with intrathoracic endometriosis (12 Dec 1998) |