The quality or state of being irrational; want of the faculty or the quality of reason; fatuity. / Something which is irrational or brought forth by irrational action, judgement, idea or thought.

plural of remediation

The eleventh letter of many Semitic alphabets/abjads (Phoenician, Aramaic, Hebrew, Syriac, Arabic and others).

(education, of a school) Providing instruction for female students only.