chronotherapy

[ kron-uh-ther-uh-pee, kroh-nuh- ]
/ ˌkrɒn əˈθɛr ə pi, ˌkroʊ nə- /

noun Medicine/Medical.

a treatment for insomnia in which a person's normal cycle of waking and sleeping is altered.

Origin of chronotherapy

First recorded in 1975–80; chrono- + therapy