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chronotherapy

[kron-uh-ther-uh-pee, kroh-nuh-]
noun Medicine/Medical.
  1. a treatment for insomnia in which a person's normal cycle of waking and sleeping is altered.
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Origin of chronotherapy

First recorded in 1975–80; chrono- + therapy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018