Of or relating to the menses or menstruation(adjective)
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Use "catamenial" in a sentence
"By chance, while working as an English teacher I also have a degree in English I discovered other women were suffering from what is termed catamenial epilepsy, seizures caused by the menstrual cycle."
"I know that the Yale Law School doesn't just let anyone in (and the only language missing from the frequent quotations at Scott Horton's Harper's blog, as far as I can tell, is Hittite), but what are the chances that this law student being interviewed would a) know the word "catamenial" and b) use it in conversation?"
"Lie thou down with me on thy own bed, after the catamenial bath, on the night of the eighth or the fourteenth day of the moon. '"