Definition of virtus dormitiva in English:

virtus dormitiva

(also vertus dormitiva)

Pronunciation /ˌvɪətʊs dɔːmɪˈtiːvə/ /ˌvəːtəs dɔːmɪˈtʌɪvə/


  • 1A sleep-inducing property or effect of a drug.

  • 2Philosophy
    An explanation which merely restates in different (especially overly technical or abstract) words the very thing which is to be explained; a circular or tautological explanation.


Mid 19th century. From post-classical Latin virtus dormitiva dormitive property from classical Latin virtus + post-classical Latin dormitiva, feminine of dormitivus.