Abnormal (&unr_;), a. [For earlier anormal, F. anormal, LL. anormalus for anomalus, Gr. &unr_;. Confused with L. abnormis. See Anomalous, Abnormous, Anormal.] Not conformed to rule or system; deviating from the type; anomalous; irregular. “That deviating from the type; anomalous; irregular. ” Froude.
[1913 Webster]