orifice

US /ˈɔːr.ə.fɪs/
UK /ˈɔːr.ə.fɪs/
"orifice" picture
1.

開口部, 穴

a mouth or aperture, as of a tube or pipe, or of a cavity in the body

:
The surgeon carefully examined the small orifice.
外科医は小さな開口部を注意深く調べた。
Water flowed out of the narrow orifice.
狭い開口部から水が流れ出た。