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hypnoˈlogical
hypnoˈlogical adj.
Brit. 
/ˌhɪpnəˈlɒdʒᵻkl/
, /ˌhɪpnəˈlɒdʒᵻkl/U.S. /ˌhɪpnəˈlɑdʒək(ə)l/
of or pertaining to hypnology./ˌhɪpnəˈlɑdʒək(ə)l/ΘΠ
the world > physical sensation > sleeping and waking > sleep > [adjective] > science of sleep
hypnological1847
hypnologic1886
1847 J. Craig New Universal Dict. Hypnological.
1860 Year-bk. Med. 1859 (New Sydenham Soc.) 203 Azam has repeated Mr. Braid's hypnological experiments, and finds that catalepsy and anæsthesia can be obtained in the way he indicates.
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