A mental state marked by abnormal variations in mood. ... Origin: poikilo-+ G. Thymos, mind ... (05 Mar 2000) ... 
Type: Term Pronunciation: poy′ki-lō-thī′mē-ă Definitions: 1. A rarely used term for a mental state marked by abnormal variations in mood.
poikilothymia 1. Extreme changes of mood. 2. A mental condition characterized by abnormal variations of mood.