druidic sleep en · NOUN
Meanings
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(uncountable) The act or art of hypnosis as practised by ancient Druids.
The process of animal hypnosis has been called catatonia, catalepsy, thanatosis, akinesis, and action inhibition; in man it has been known as mesmerism, animal magnetism, somnambulism, reverie, and druidic sleep.
1973, Lyall Watson, Supernature, page vii. 213: