Definition of orificial in US English:

orificial

adjective

  • 1Of or relating to an orifice or orifices; ostial.

  • 2Medicine. Designating, relating to, or practising surgery intended to cure chronic disease by relieving supposed irritation of the external orifices of the body (especially the anal, urethral, and vaginal orifices). Now historical.

Origin

Late Middle English (in an earlier sense). In Middle English from post-classical Latin orificialis of or relating to an orifice or orifices from classical Latin ōrificium + -ālis. In later use from orifice + -ial.

Pronunciation

orificial

/ˌɒrɪˈfɪʃl/