Source : Webster's Revised Unabridged Dictionary (1913)

Hyperdulia \Hy`per*du*li"a\, n. [Pref. hyper- + dulia: cf. F.
   hyperdulie.] (R. C. Ch.)
   Veneration or worship given to the Virgin Mary as the most
   exalted of mere creatures; higher veneration than dulia.
   --Addis & Arnold.