noun
historical, rareThe sleep of the soul between death and the Day of Judgement; an instance of this.
Origin
Mid 17th century; earliest use found in Henry More (1614–1687), philosopher, poet, and theologian. From post-classical Latin psychopannychia from ancient Greek ψυχο- + παννύχιος lasting all night from παν- + νύχιος belonging to night, taking place at night from νυχ-, alternative stem of νυκτ-, νύξ night, cognate with night + -ιος, suffix forming adjectives.
Are You Learning English? Here Are Our Top English Tips