The stage of semi-unconsciousness preceding actual sleep. ... Origin: pre-+ L. Dormio, to sleep ... (05 Mar 2000) ... 
Type: Term Pronunciation: prē-dōr-mi′tŭm Definitions: 1. The stage of decreasing consciousness that represents a transition stage between wakefulness and sleep.
predormitum 1. The stage of semi-unconsciousness preceding actual sleep. 2. The period of waning consciousness interposed between the waking state and sound slumber. Related 'sleep' units: hypno-; letho-; narco-; oneiro- (dream); somni-; sopor-.