Source : Webster's Revised Unabridged Dictionary (1913)

Hierolatry \Hi`er*ol"a*try\, n. [Gr. "iero`s sacred + ? worship,
   ? to worship.]
   The worship of saints or sacred things. [R.] --Coleridge.

Source : WordNet®

hierolatry
     n : worship of saints [syn: {hagiolatry}, {worship of saints}]