Definition of ostensorium in English:

ostensorium

noun

  • An open or transparent receptacle used to display the Host to the congregation at mass; a monstrance.

Origin

Mid 18th century; earliest use found in John Adams. From post-classical Latin ostensorium monstrance from classical Latin ostens-, past participial stem of ostendere + -ōrium. Compare earlier ostensorio.

Pronunciation

ostensorium

/ˌɒstɛnˈsɔːrɪəm/