polysomnography

noun

poly·​som·​nog·​ra·​phy -fē 

plural polysomnographies

: the technique or process of using a polygraph to make a continuous record during sleep of multiple physiological variables (as breathing, heart rate, and muscle activity)

polysomnographic

-ˌsäm-nə-ˈgraf-ik 

adjective

polysomnographically

-i-k(ə-)lē 

adverb